### Home Classes Methods

### In Files

- lib/sequel/database/schema_generator.rb
- lib/sequel/extensions/schema_dumper.rb

### Parent

Object

### Methods

- ::add_type_method
- ::new
- #check
- #column
- #constraint
- #dump_columns
- #dump_constraints
- #dump_indexes
- #foreign_key
- #full_text_index
- #has_column?
- #index
- #method_missing
- #primary_key
- #primary_key_name
- #respond_to_missing?
- #spatial_index
- #unique

### Files

- CHANGELOG
- MIT-LICENSE
- README.rdoc
- active_record.rdoc
- advanced_associations.rdoc
- association_basics.rdoc
- bin_sequel.rdoc
- cheat_sheet.rdoc
- code_order.rdoc
- core_extensions.rdoc
- dataset_basics.rdoc
- dataset_filtering.rdoc
- mass_assignment.rdoc
- migration.rdoc
- model_hooks.rdoc
- object_model.rdoc
- opening_databases.rdoc
- postgresql.rdoc
- prepared_statements.rdoc
- querying.rdoc
- reflection.rdoc
- 1.0.txt
- 1.1.txt
- 1.3.txt
- 1.4.0.txt
- 1.5.0.txt
- 2.0.0.txt
- 2.1.0.txt
- 2.10.0.txt
- 2.11.0.txt
- 2.12.0.txt
- 2.2.0.txt
- 2.3.0.txt
- 2.4.0.txt
- 2.5.0.txt
- 2.6.0.txt
- 2.7.0.txt
- 2.8.0.txt
- 2.9.0.txt
- 3.0.0.txt
- 3.1.0.txt
- 3.10.0.txt
- 3.11.0.txt
- 3.12.0.txt
- 3.13.0.txt
- 3.14.0.txt
- 3.15.0.txt
- 3.16.0.txt
- 3.17.0.txt
- 3.18.0.txt
- 3.19.0.txt
- 3.2.0.txt
- 3.20.0.txt
- 3.21.0.txt
- 3.22.0.txt
- 3.23.0.txt
- 3.24.0.txt
- 3.25.0.txt
- 3.26.0.txt
- 3.27.0.txt
- 3.28.0.txt
- 3.29.0.txt
- 3.3.0.txt
- 3.30.0.txt
- 3.31.0.txt
- 3.32.0.txt
- 3.33.0.txt
- 3.34.0.txt
- 3.35.0.txt
- 3.36.0.txt
- 3.37.0.txt
- 3.38.0.txt
- 3.39.0.txt
- 3.4.0.txt
- 3.40.0.txt
- 3.41.0.txt
- 3.42.0.txt
- 3.43.0.txt
- 3.44.0.txt
- 3.45.0.txt
- 3.46.0.txt
- 3.47.0.txt
- 3.48.0.txt
- 3.5.0.txt
- 3.6.0.txt
- 3.7.0.txt
- 3.8.0.txt
- 3.9.0.txt
- schema_modification.rdoc
- security.rdoc
- sharding.rdoc
- sql.rdoc
- testing.rdoc
- thread_safety.rdoc
- transactions.rdoc
- validations.rdoc
- virtual_rows.rdoc

### Class/Module Index

Quicksearch

- Sequel
- Sequel::ADO
- Sequel::ADO::Access
- Sequel::ADO::Access::AdoSchema
- Sequel::ADO::Access::AdoSchema::Column
- Sequel::ADO::Access::DatabaseMethods
- Sequel::ADO::Access::Dataset
- Sequel::ADO::Database
- Sequel::ADO::Dataset
- Sequel::ADO::MSSQL
- Sequel::ADO::MSSQL::DatabaseMethods
- Sequel::ADO::MSSQL::Dataset
- Sequel::ASTTransformer
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- Sequel::Access::DatasetMethods
- Sequel::AdapterNotFound
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- Sequel::Amalgalite::SequelTypeMap
- Sequel::ArbitraryServers
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- Sequel::BeforeHookFailed
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- Sequel::EmulateOffsetWithRowNumber
- Sequel::Error
- Sequel::Error::AdapterNotFound
- Sequel::Error::InvalidOperation
- Sequel::Error::InvalidValue
- Sequel::Error::PoolTimeoutError
- Sequel::Error::Rollback
- Sequel::EvalInspect
- Sequel::FilterHaving
- Sequel::Firebird
- Sequel::Firebird::Database
- Sequel::Firebird::DatabaseMethods
- Sequel::Firebird::Dataset
- Sequel::Firebird::DatasetMethods
- Sequel::ForeignKeyConstraintViolation
- Sequel::GraphEach
- Sequel::HashAliases
- Sequel::HookFailed
- Sequel::IBMDB
- Sequel::IBMDB::Connection
- Sequel::IBMDB::Connection::Error
- Sequel::IBMDB::Database
- Sequel::IBMDB::Dataset
- Sequel::IBMDB::Dataset::CallableStatementMethods
- Sequel::IBMDB::Dataset::PreparedStatementMethods
- Sequel::IBMDB::Statement
- Sequel::Inflections
- Sequel::Informix
- Sequel::Informix::Database
- Sequel::Informix::DatabaseMethods
- Sequel::Informix::Dataset
- Sequel::Informix::DatasetMethods
- Sequel::IntegerMigrator
- Sequel::InvalidOperation
- Sequel::InvalidValue
- Sequel::JDBC
- Sequel::JDBC::AS400
- Sequel::JDBC::AS400::DatabaseMethods
- Sequel::JDBC::AS400::Dataset
- Sequel::JDBC::Cubrid
- Sequel::JDBC::Cubrid::DatabaseMethods
- Sequel::JDBC::DB2
- Sequel::JDBC::DB2::DatabaseMethods
- Sequel::JDBC::DB2::Dataset
- Sequel::JDBC::DB2::Dataset::Sequel
- Sequel::JDBC::DB2::Dataset::Sequel::JDBC
- Sequel::JDBC::DB2::Dataset::Sequel::JDBC::Dataset
- Sequel::JDBC::DB2::Dataset::Sequel::JDBC::Dataset::TYPE_TRANSLATOR
- Sequel::JDBC::Database
- Sequel::JDBC::Dataset
- Sequel::JDBC::Dataset::PreparedStatementMethods
- Sequel::JDBC::Dataset::StoredProcedureMethods
- Sequel::JDBC::Dataset::TYPE_TRANSLATOR
- Sequel::JDBC::Derby
- Sequel::JDBC::Derby::DatabaseMethods
- Sequel::JDBC::Derby::Dataset
- Sequel::JDBC::Derby::Dataset::Sequel
- Sequel::JDBC::Derby::Dataset::Sequel::JDBC
- Sequel::JDBC::Derby::Dataset::Sequel::JDBC::Dataset
- Sequel::JDBC::Derby::Dataset::Sequel::JDBC::Dataset::TYPE_TRANSLATOR
- Sequel::JDBC::Firebird
- Sequel::JDBC::Firebird::DatabaseMethods
- Sequel::JDBC::H2
- Sequel::JDBC::H2::DatabaseMethods
- Sequel::JDBC::H2::Dataset
- Sequel::JDBC::H2::Dataset::Sequel
- Sequel::JDBC::H2::Dataset::Sequel::JDBC
- Sequel::JDBC::H2::Dataset::Sequel::JDBC::Dataset
- Sequel::JDBC::H2::Dataset::Sequel::JDBC::Dataset::TYPE_TRANSLATOR
- Sequel::JDBC::HSQLDB
- Sequel::JDBC::HSQLDB::DatabaseMethods
- Sequel::JDBC::HSQLDB::Dataset
- Sequel::JDBC::Informix
- Sequel::JDBC::Informix::DatabaseMethods
- Sequel::JDBC::JTDS
- Sequel::JDBC::JTDS::DatabaseMethods
- Sequel::JDBC::JTDS::Dataset
- Sequel::JDBC::JTDS::Dataset::Sequel
- Sequel::JDBC::JTDS::Dataset::Sequel::JDBC
- Sequel::JDBC::JTDS::Dataset::Sequel::JDBC::Dataset
- Sequel::JDBC::JTDS::Dataset::Sequel::JDBC::Dataset::TYPE_TRANSLATOR
- Sequel::JDBC::JavaLang
- Sequel::JDBC::JavaSQL
- Sequel::JDBC::JavaxNaming
- Sequel::JDBC::MSSQL
- Sequel::JDBC::MSSQL::DatabaseMethods
- Sequel::JDBC::MySQL
- Sequel::JDBC::MySQL::DatabaseMethods
- Sequel::JDBC::Oracle
- Sequel::JDBC::Oracle::DatabaseMethods
- Sequel::JDBC::Oracle::Dataset
- Sequel::JDBC::Oracle::Dataset::Sequel
- Sequel::JDBC::Oracle::Dataset::Sequel::JDBC
- Sequel::JDBC::Oracle::Dataset::Sequel::JDBC::Dataset
- Sequel::JDBC::Oracle::Dataset::Sequel::JDBC::Dataset::TYPE_TRANSLATOR
- Sequel::JDBC::Postgres
- Sequel::JDBC::Postgres::DatabaseMethods
- Sequel::JDBC::Postgres::Dataset
- Sequel::JDBC::Postgres::Dataset::PGArrayConverter
- Sequel::JDBC::Postgres::Dataset::Sequel
- Sequel::JDBC::Postgres::Dataset::Sequel::JDBC
- Sequel::JDBC::Postgres::Dataset::Sequel::JDBC::Dataset
- Sequel::JDBC::Postgres::Dataset::Sequel::JDBC::Dataset::TYPE_TRANSLATOR
- Sequel::JDBC::Progress
- Sequel::JDBC::Progress::DatabaseMethods
- Sequel::JDBC::SQLServer
- Sequel::JDBC::SQLServer::DatabaseMethods
- Sequel::JDBC::SQLServer::DatabaseMethods::MetadataDatasetMethods
- Sequel::JDBC::SQLite
- Sequel::JDBC::SQLite::DatabaseMethods
- Sequel::JDBC::Transactions
- Sequel::LiteralString
- Sequel::LooserTypecasting
- Sequel::MSSQL
- Sequel::MSSQL::DatabaseMethods
- Sequel::MSSQL::DatasetMethods
- Sequel::Metaprogramming
- Sequel::Migration
- Sequel::MigrationAlterTableReverser
- Sequel::MigrationDSL
- Sequel::MigrationReverser
- Sequel::Migrator
- Sequel::Migrator::Error
- Sequel::Migrator::NotCurrentError
- Sequel::Mock
- Sequel::Mock::Connection
- Sequel::Mock::Database
- Sequel::Mock::Dataset
- Sequel::Model
- Sequel::Model::Associations
- Sequel::Model::Associations::AssociationDatasetMethods
- Sequel::Model::Associations::AssociationReflection
- Sequel::Model::Associations::ClassMethods
- Sequel::Model::Associations::DatasetMethods
- Sequel::Model::Associations::EagerGraphLoader
- Sequel::Model::Associations::InstanceMethods
- Sequel::Model::Associations::ManyToManyAssociationReflection
- Sequel::Model::Associations::ManyToOneAssociationReflection
- Sequel::Model::Associations::OneToManyAssociationReflection
- Sequel::Model::Associations::OneToOneAssociationReflection
- Sequel::Model::ClassMethods
- Sequel::Model::DatasetMethods
- Sequel::Model::DatasetModule
- Sequel::Model::Errors
- Sequel::Model::InstanceMethods
- Sequel::MySQL
- Sequel::MySQL::Database
- Sequel::MySQL::DatabaseMethods
- Sequel::MySQL::Dataset
- Sequel::MySQL::DatasetMethods
- Sequel::MySQL::PreparedStatements
- Sequel::MySQL::PreparedStatements::DatabaseMethods
- Sequel::MySQL::PreparedStatements::DatasetMethods
- Sequel::MySQL::PreparedStatements::DatasetMethods::CallableStatementMethods
- Sequel::MySQL::PreparedStatements::DatasetMethods::PreparedStatementMethods
- Sequel::MySQL::PreparedStatements::DatasetMethods::StoredProcedureMethods
- Sequel::Mysql2
- Sequel::Mysql2::Database
- Sequel::Mysql2::Dataset
- Sequel::NamedTimezones
- Sequel::NamedTimezones::DatabaseMethods
- Sequel::NoExistingObject
- Sequel::NoMatchingRow
- Sequel::NotImplemented
- Sequel::NotNullConstraintViolation
- Sequel::ODBC
- Sequel::ODBC::Database
- Sequel::ODBC::Dataset
- Sequel::ODBC::MSSQL
- Sequel::ODBC::MSSQL::DatabaseMethods
- Sequel::ODBC::MSSQL::Dataset
- Sequel::OpenBase
- Sequel::OpenBase::Database
- Sequel::OpenBase::Dataset
- Sequel::Oracle
- Sequel::Oracle::Database
- Sequel::Oracle::DatabaseMethods
- Sequel::Oracle::Dataset
- Sequel::Oracle::Dataset::ArgumentMapper
- Sequel::Oracle::Dataset::BindArgumentMethods
- Sequel::Oracle::Dataset::PreparedStatementMethods
- Sequel::Oracle::DatasetMethods
- Sequel::Plugins
- Sequel::Plugins::ActiveModel
- Sequel::Plugins::ActiveModel::ClassMethods
- Sequel::Plugins::ActiveModel::Errors
- Sequel::Plugins::ActiveModel::InstanceMethods
- Sequel::Plugins::AfterInitialize
- Sequel::Plugins::AfterInitialize::ClassMethods
- Sequel::Plugins::AfterInitialize::InstanceMethods
- Sequel::Plugins::AssociationAutoreloading
- Sequel::Plugins::AssociationAutoreloading::ClassMethods
- Sequel::Plugins::AssociationAutoreloading::InstanceMethods
- Sequel::Plugins::AssociationDependencies
- Sequel::Plugins::AssociationDependencies::ClassMethods
- Sequel::Plugins::AssociationDependencies::InstanceMethods
- Sequel::Plugins::AssociationPks
- Sequel::Plugins::AssociationPks::ClassMethods
- Sequel::Plugins::AssociationPks::InstanceMethods
- Sequel::Plugins::AssociationProxies
- Sequel::Plugins::AssociationProxies::AssociationProxy
- Sequel::Plugins::AssociationProxies::ClassMethods
- Sequel::Plugins::AutoValidations
- Sequel::Plugins::AutoValidations::ClassMethods
- Sequel::Plugins::AutoValidations::InstanceMethods
- Sequel::Plugins::BlacklistSecurity
- Sequel::Plugins::BlacklistSecurity::ClassMethods
- Sequel::Plugins::BlacklistSecurity::InstanceMethods
- Sequel::Plugins::BooleanReaders
- Sequel::Plugins::BooleanReaders::ClassMethods
- Sequel::Plugins::Caching
- Sequel::Plugins::Caching::ClassMethods
- Sequel::Plugins::Caching::InstanceMethods
- Sequel::Plugins::ClassTableInheritance
- Sequel::Plugins::ClassTableInheritance::ClassMethods
- Sequel::Plugins::ClassTableInheritance::InstanceMethods
- Sequel::Plugins::Composition
- Sequel::Plugins::Composition::ClassMethods
- Sequel::Plugins::Composition::InstanceMethods
- Sequel::Plugins::ConstraintValidations
- Sequel::Plugins::ConstraintValidations::ClassMethods
- Sequel::Plugins::ConstraintValidations::DatabaseMethods
- Sequel::Plugins::ConstraintValidations::InstanceMethods
- Sequel::Plugins::DatasetAssociations
- Sequel::Plugins::DatasetAssociations::ClassMethods
- Sequel::Plugins::DatasetAssociations::DatasetMethods
- Sequel::Plugins::DefaultsSetter
- Sequel::Plugins::DefaultsSetter::ClassMethods
- Sequel::Plugins::DefaultsSetter::InstanceMethods
- Sequel::Plugins::Dirty
- Sequel::Plugins::Dirty::InstanceMethods
- Sequel::Plugins::EagerEach
- Sequel::Plugins::EagerEach::DatasetMethods
- Sequel::Plugins::ErrorSplitter
- Sequel::Plugins::ErrorSplitter::InstanceMethods
- Sequel::Plugins::ForceEncoding
- Sequel::Plugins::ForceEncoding::ClassMethods
- Sequel::Plugins::ForceEncoding::InstanceMethods
- Sequel::Plugins::HookClassMethods
- Sequel::Plugins::HookClassMethods::ClassMethods
- Sequel::Plugins::HookClassMethods::InstanceMethods
- Sequel::Plugins::IdentityMap
- Sequel::Plugins::IdentityMap::ClassMethods
- Sequel::Plugins::IdentityMap::InstanceMethods
- Sequel::Plugins::InputTransformer
- Sequel::Plugins::InputTransformer::ClassMethods
- Sequel::Plugins::InputTransformer::InstanceMethods
- Sequel::Plugins::InstanceFilters
- Sequel::Plugins::InstanceFilters::InstanceMethods
- Sequel::Plugins::InstanceHooks
- Sequel::Plugins::InstanceHooks::InstanceMethods
- Sequel::Plugins::JsonSerializer
- Sequel::Plugins::JsonSerializer::ClassMethods
- Sequel::Plugins::JsonSerializer::DatasetMethods
- Sequel::Plugins::JsonSerializer::InstanceMethods
- Sequel::Plugins::JsonSerializer::Literal
- Sequel::Plugins::LazyAttributes
- Sequel::Plugins::LazyAttributes::ClassMethods
- Sequel::Plugins::LazyAttributes::InstanceMethods
- Sequel::Plugins::List
- Sequel::Plugins::List::ClassMethods
- Sequel::Plugins::List::InstanceMethods
- Sequel::Plugins::ManyThroughMany
- Sequel::Plugins::ManyThroughMany::ClassMethods
- Sequel::Plugins::ManyThroughMany::DatasetMethods
- Sequel::Plugins::ManyThroughMany::ManyThroughManyAssociationReflection
- Sequel::Plugins::ManyToOnePkLookup
- Sequel::Plugins::ManyToOnePkLookup::ClassMethods
- Sequel::Plugins::ManyToOnePkLookup::InstanceMethods
- Sequel::Plugins::NestedAttributes
- Sequel::Plugins::NestedAttributes::ClassMethods
- Sequel::Plugins::NestedAttributes::InstanceMethods
- Sequel::Plugins::OptimisticLocking
- Sequel::Plugins::OptimisticLocking::ClassMethods
- Sequel::Plugins::OptimisticLocking::InstanceMethods
- Sequel::Plugins::PgRow
- Sequel::Plugins::PgRow::ClassMethods
- Sequel::Plugins::PgRow::DatabaseMethods
- Sequel::Plugins::PgRow::InstanceMethods
- Sequel::Plugins::PgTypecastOnLoad
- Sequel::Plugins::PgTypecastOnLoad::ClassMethods
- Sequel::Plugins::PgTypecastOnLoad::InstanceMethods
- Sequel::Plugins::PreparedStatements
- Sequel::Plugins::PreparedStatements::ClassMethods
- Sequel::Plugins::PreparedStatements::InstanceMethods
- Sequel::Plugins::PreparedStatementsAssociations
- Sequel::Plugins::PreparedStatementsAssociations::ClassMethods
- Sequel::Plugins::PreparedStatementsAssociations::InstanceMethods
- Sequel::Plugins::PreparedStatementsSafe
- Sequel::Plugins::PreparedStatementsSafe::ClassMethods
- Sequel::Plugins::PreparedStatementsSafe::InstanceMethods
- Sequel::Plugins::PreparedStatementsWithPk
- Sequel::Plugins::PreparedStatementsWithPk::ClassMethods
- Sequel::Plugins::PreparedStatementsWithPk::DatasetMethods
- Sequel::Plugins::RcteTree
- Sequel::Plugins::Schema
- Sequel::Plugins::Schema::ClassMethods
- Sequel::Plugins::Scissors
- Sequel::Plugins::Scissors::ClassMethods
- Sequel::Plugins::Serialization
- Sequel::Plugins::Serialization::ClassMethods
- Sequel::Plugins::Serialization::InstanceMethods
- Sequel::Plugins::SerializationModificationDetection
- Sequel::Plugins::SerializationModificationDetection::InstanceMethods
- Sequel::Plugins::Sharding
- Sequel::Plugins::Sharding::ClassMethods
- Sequel::Plugins::Sharding::DatasetMethods
- Sequel::Plugins::Sharding::InstanceMethods
- Sequel::Plugins::SingleTableInheritance
- Sequel::Plugins::SingleTableInheritance::ClassMethods
- Sequel::Plugins::SingleTableInheritance::InstanceMethods
- Sequel::Plugins::SkipCreateRefresh
- Sequel::Plugins::SkipCreateRefresh::InstanceMethods
- Sequel::Plugins::StaticCache
- Sequel::Plugins::StaticCache::ClassMethods
- Sequel::Plugins::StringStripper
- Sequel::Plugins::StringStripper::ClassMethods
- Sequel::Plugins::Subclasses
- Sequel::Plugins::Subclasses::ClassMethods
- Sequel::Plugins::TacticalEagerLoading
- Sequel::Plugins::TacticalEagerLoading::DatasetMethods
- Sequel::Plugins::TacticalEagerLoading::InstanceMethods
- Sequel::Plugins::Timestamps
- Sequel::Plugins::Timestamps::ClassMethods
- Sequel::Plugins::Timestamps::InstanceMethods
- Sequel::Plugins::Touch
- Sequel::Plugins::Touch::ClassMethods
- Sequel::Plugins::Touch::InstanceMethods
- Sequel::Plugins::Tree
- Sequel::Plugins::Tree::ClassMethods
- Sequel::Plugins::Tree::InstanceMethods
- Sequel::Plugins::Tree::SingleRoot
- Sequel::Plugins::Tree::SingleRoot::ClassMethods
- Sequel::Plugins::Tree::SingleRoot::InstanceMethods
- Sequel::Plugins::Tree::TreeMultipleRootError
- Sequel::Plugins::TypecastOnLoad
- Sequel::Plugins::TypecastOnLoad::ClassMethods
- Sequel::Plugins::TypecastOnLoad::InstanceMethods
- Sequel::Plugins::UnlimitedUpdate
- Sequel::Plugins::UnlimitedUpdate::InstanceMethods
- Sequel::Plugins::UpdatePrimaryKey
- Sequel::Plugins::UpdatePrimaryKey::InstanceMethods
- Sequel::Plugins::ValidationClassMethods
- Sequel::Plugins::ValidationClassMethods::ClassMethods
- Sequel::Plugins::ValidationClassMethods::ClassMethods::Generator
- Sequel::Plugins::ValidationClassMethods::InstanceMethods
- Sequel::Plugins::ValidationHelpers
- Sequel::Plugins::ValidationHelpers::InstanceMethods
- Sequel::Plugins::XmlSerializer
- Sequel::Plugins::XmlSerializer::ClassMethods
- Sequel::Plugins::XmlSerializer::DatasetMethods
- Sequel::Plugins::XmlSerializer::InstanceMethods
- Sequel::PoolTimeout
- Sequel::Postgres
- Sequel::Postgres::Adapter
- Sequel::Postgres::AlterTableGenerator
- Sequel::Postgres::ArrayOp
- Sequel::Postgres::ArrayOpMethods
- Sequel::Postgres::AutoParameterize
- Sequel::Postgres::AutoParameterize::DatabaseMethods
- Sequel::Postgres::AutoParameterize::DatasetMethods
- Sequel::Postgres::AutoParameterize::StringWithArray
- Sequel::Postgres::CreateTableGenerator
- Sequel::Postgres::Database
- Sequel::Postgres::DatabaseMethods
- Sequel::Postgres::Dataset
- Sequel::Postgres::Dataset::ArgumentMapper
- Sequel::Postgres::Dataset::BindArgumentMethods
- Sequel::Postgres::Dataset::PreparedStatementMethods
- Sequel::Postgres::DatasetMethods
- Sequel::Postgres::DatasetMethods::PreparedStatementMethods
- Sequel::Postgres::ExclusionConstraintViolation
- Sequel::Postgres::HStore
- Sequel::Postgres::HStore::DatabaseMethods
- Sequel::Postgres::HStore::Parser
- Sequel::Postgres::HStoreOp
- Sequel::Postgres::HStoreOpMethods
- Sequel::Postgres::InetDatabaseMethods
- Sequel::Postgres::InetDatasetMethods
- Sequel::Postgres::IntervalDatabaseMethods
- Sequel::Postgres::IntervalDatabaseMethods::Parser
- Sequel::Postgres::IntervalDatasetMethods
- Sequel::Postgres::JSONArray
- Sequel::Postgres::JSONDatabaseMethods
- Sequel::Postgres::JSONHash
- Sequel::Postgres::PGArray
- Sequel::Postgres::PGArray::Creator
- Sequel::Postgres::PGArray::DatabaseMethods
- Sequel::Postgres::PGArray::JSONCreator
- Sequel::Postgres::PGArray::Parser
- Sequel::Postgres::PGRange
- Sequel::Postgres::PGRange::DatabaseMethods
- Sequel::Postgres::PGRange::DatasetMethods
- Sequel::Postgres::PGRange::Parser
- Sequel::Postgres::PGRow
- Sequel::Postgres::PGRow::ArrayRow
- Sequel::Postgres::PGRow::DatabaseMethods
- Sequel::Postgres::PGRow::HashRow
- Sequel::Postgres::PGRow::Parser
- Sequel::Postgres::PGRow::Splitter
- Sequel::Postgres::PGRowOp
- Sequel::Postgres::PGRowOp::ExpressionMethods
- Sequel::Postgres::RangeOp
- Sequel::Postgres::RangeOpMethods
- Sequel::Postgres::StatementCache
- Sequel::Postgres::StatementCache::AdapterMethods
- Sequel::Postgres::StatementCache::DatabaseMethods
- Sequel::Postgres::StatementCache::Statement
- Sequel::Postgres::StatementCache::StatementCache
- Sequel::PrettyTable
- Sequel::Progress
- Sequel::Progress::DatabaseMethods
- Sequel::Progress::DatasetMethods
- Sequel::Qualifier
- Sequel::QueryLiterals
- Sequel::Rollback
- Sequel::SQL
- Sequel::SQL::AliasMethods
- Sequel::SQL::AliasedExpression
- Sequel::SQL::BitwiseMethods
- Sequel::SQL::Blob
- Sequel::SQL::BooleanConstant
- Sequel::SQL::BooleanExpression
- Sequel::SQL::BooleanMethods
- Sequel::SQL::Builders
- Sequel::SQL::CaseExpression
- Sequel::SQL::Cast
- Sequel::SQL::CastMethods
- Sequel::SQL::ColumnAll
- Sequel::SQL::ComplexExpression
- Sequel::SQL::ComplexExpressionMethods
- Sequel::SQL::Constant
- Sequel::SQL::Constants
- Sequel::SQL::DateAdd
- Sequel::SQL::DateAdd::DatasetMethods
- Sequel::SQL::DelayedEvaluation
- Sequel::SQL::EmulatedFunction
- Sequel::SQL::Expression
- Sequel::SQL::Function
- Sequel::SQL::GenericExpression
- Sequel::SQL::Identifier
- Sequel::SQL::InequalityMethods
- Sequel::SQL::JoinClause
- Sequel::SQL::JoinOnClause
- Sequel::SQL::JoinUsingClause
- Sequel::SQL::NegativeBooleanConstant
- Sequel::SQL::NoBooleanInputMethods
- Sequel::SQL::NumericExpression
- Sequel::SQL::NumericMethods
- Sequel::SQL::OperatorBuilders
- Sequel::SQL::OrderMethods
- Sequel::SQL::OrderedExpression
- Sequel::SQL::PlaceholderLiteralString
- Sequel::SQL::QualifiedIdentifier
- Sequel::SQL::QualifyingMethods
- Sequel::SQL::SQLArray
- Sequel::SQL::StringConcatenationMethods
- Sequel::SQL::StringExpression
- Sequel::SQL::StringMethods
- Sequel::SQL::Subscript
- Sequel::SQL::SubscriptMethods
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- Sequel::SQLite::Dataset::PreparedStatementMethods
- Sequel::SQLite::DatasetMethods
- Sequel::Schema
- Sequel::Schema::AlterTableGenerator
- Sequel::Schema::CreateTableGenerator
- Sequel::Schema::Generator
- Sequel::SchemaCaching
- Sequel::SchemaDumper
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No matching classes.

# Sequel::Schema::Generator

Schema::CreateTableGenerator is an internal class that the user is not expected to instantiate directly. Instances are created by Database#create_table. It is used to specify table creation parameters. It takes a Database object and a block of column/index/constraint specifications, and gives the Database a table description, which the database uses to create a table.

Schema::CreateTableGenerator has some methods but also includes method_missing, allowing users to specify column type as a method instead of using the column method, which makes for a nicer DSL.

For more information on Sequel's support for schema modification, see the "Schema Modification" guide.

### Constants

GENERIC_TYPES

  Classes specifying generic types that Sequel will convert to database-specific types.

### Attributes

columns[R]

Return the column hashes created by this generator

constraints[R]

Return the constraint hashes created by this generator

indexes[R]

Return the index hashes created by this generator

### Public Class Methods

add_type_method(*types) click to toggle source

Add a method for each of the given types that creates a column with that type as a constant. Types given should either already be constants/classes or a capitalized string/symbol with the same name as a constant/class.

Do not call this method with untrusted input, as that can result in arbitrary code execution.

    # File lib/sequel/database/schema_generator.rb, line 50
    def self.add_type_method(*types)
      types.each do |type|
        class_eval("def #{type}(name, opts={}); column(name, #{type}, opts); end", __FILE__, __LINE__)
      end
    end

new(db, &block) click to toggle source

Set the database in which to create the table, and evaluate the block in the context of this object.

    # File lib/sequel/database/schema_generator.rb, line 33
    def initialize(db, &block)
      @db = db
      @columns = []
      @indexes = []
      @constraints = []
      @primary_key = nil
      instance_eval(&block) if block
      @columns.unshift(@primary_key) if @primary_key && !has_column?(primary_key_name)
    end

### Public Instance Methods

check(*args, &block) click to toggle source

Add an unnamed constraint to the DDL, specified by the given block or args:

    check(:num=>1..5) # CHECK num >= 1 AND num <= 5
    check{num > 5} # CHECK num > 5

    # File lib/sequel/database/schema_generator.rb, line 61
    def check(*args, &block)
      constraint(nil, *args, &block)
    end

column(name, type, opts = {}) click to toggle source

Add a column with the given name, type, and opts to the DDL.

    column :num, :integer
    # num INTEGER

    column :name, String, :null=>false, :default=>'a'
    # name varchar(255) NOT NULL DEFAULT 'a'

    inet :ip
    # ip inet

You can also create columns via method missing, so the following are equivalent:

    column :number, :integer
    integer :number

The following options are supported:

:default | The default value for the column.
:deferrable | For foreign key columns, this ensures referential integrity will work even if referencing table uses a foreign key value that does not yet exist on referenced table (but will exist before the transaction commits). Basically it adds DEFERRABLE INITIALLY DEFERRED on key creation. If you use :immediate as the value, uses DEFERRABLE INITIALLY IMMEDIATE.
:index | Create an index on this column. If given a hash, use the hash as the options for the index.
:key | For foreign key columns, the column in the associated table that this column references. Unnecessary if this column references the primary key of the associated table, except if you are using MySQL.
:null | Mark the column as allowing NULL values (if true), or not allowing NULL values (if false). If unspecified, will default to whatever the database default is.
:on_delete | Specify the behavior of this column when being deleted (:restrict, :cascade, :set_null, :set_default, :no_action).
:on_update | Specify the behavior of this column when being updated (:restrict, :cascade, :set_null, :set_default, :no_action).
:primary_key | Make the column as a single primary key column. This should only be used if you have a single, nonautoincrementing primary key column.
:primary_key_constraint_name | The name to give the primary key constraint
:type | Overrides the type given as the argument. Generally not used by column itself, but can be passed as an option to other methods that call column.
:unique | Mark the column as unique, generally has the same effect as creating a unique index on the column.
:unique_constraint_name | The name to give the unique key constraint

    # File lib/sequel/database/schema_generator.rb, line 111
    def column(name, type, opts = {})
      columns << {:name => name, :type => type}.merge(opts)
      if index_opts = opts[:index]
        index(name, index_opts.is_a?(Hash) ? index_opts : {})
      end
    end

constraint(name, *args, &block) click to toggle source

Adds a named constraint (or unnamed if name is nil) to the DDL, with the given block or args.

    constraint(:blah, :num=>1..5) # CONSTRAINT blah CHECK num >= 1 AND num <= 5
    check(:foo){num > 5} # CONSTRAINT foo CHECK num > 5

    # File lib/sequel/database/schema_generator.rb, line 123
    def constraint(name, *args, &block)
      constraints << {:name => name, :type => :check, :check => block || args}
    end

dump_columns() click to toggle source

Dump this generator's columns to a string that could be evaled inside another instance to represent the same columns

    # File lib/sequel/extensions/schema_dumper.rb, line 373
    def dump_columns
      strings = []
      cols = columns.dup
      cols.each do |x|
        x.delete(:on_delete) if x[:on_delete] == :no_action
        x.delete(:on_update) if x[:on_update] == :no_action
      end
      if pkn = primary_key_name
        cols.delete_if{|x| x[:name] == pkn}
        pk = @primary_key.dup
        pkname = pk.delete(:name)
        @db.serial_primary_key_options.each{|k,v| pk.delete(k) if v == pk[k]}
        strings << "primary_key #{pkname.inspect}#{opts_inspect(pk)}"
      end
      cols.each do |c|
        c = c.dup
        name = c.delete(:name)
        strings << if table = c.delete(:table)
          c.delete(:type) if c[:type] == Integer || c[:type] == 'integer'
          "foreign_key #{name.inspect}, #{table.inspect}#{opts_inspect(c)}"
        else
          type = c.delete(:type)
          opts = opts_inspect(c)
          if type.is_a?(Class)
            "#{type.name} #{name.inspect}#{opts}"
          else
            "column #{name.inspect}, #{type.inspect}#{opts}"
          end
        end
      end
      strings.join("\n")
    end

dump_constraints() click to toggle source

Dump this generator's constraints to a string that could be evaled inside another instance to represent the same constraints

    # File lib/sequel/extensions/schema_dumper.rb, line 408
    def dump_constraints
      cs = constraints.map do |c|
        c = c.dup
        type = c.delete(:type)
        case type
        when :check
          raise(Error, "can't dump check/constraint specified with Proc") if c[:check].is_a?(Proc)
          name = c.delete(:name)
          if !name and c[:check].length == 1 and c[:check].first.is_a?(Hash)
            "check #{c[:check].first.inspect[1...-1]}"
          else
            "#{name ? "constraint #{name.inspect}," : 'check'} #{c[:check].map{|x| x.inspect}.join(', ')}"
          end
        when :foreign_key
          c.delete(:on_delete) if c[:on_delete] == :no_action
          c.delete(:on_update) if c[:on_update] == :no_action
          c.delete(:deferrable) unless c[:deferrable]
          cols = c.delete(:columns)
          table = c.delete(:table)
          "#{type} #{cols.inspect}, #{table.inspect}#{opts_inspect(c)}"
        else
          cols = c.delete(:columns)
          "#{type} #{cols.inspect}#{opts_inspect(c)}"
        end
      end
      cs.join("\n")
    end

dump_indexes(options={}) click to toggle source

Dump this generator's indexes to a string that could be evaled inside another instance to represent the same indexes. Options:

- :add_index - Use add_index instead of index, so the methods can be called outside of a generator but inside a migration. The value of this option should be the table name to use.

- :drop_index - Same as add_index, but create drop_index statements.

- :ignore_errors - Add the ignore_errors option to the outputted indexes

    # File lib/sequel/extensions/schema_dumper.rb, line 443
    def dump_indexes(options={})
      is = indexes.map do |c|
        c = c.dup
        cols = c.delete(:columns)
        if table = options[:add_index] || options[:drop_index]
          "#{options[:drop_index] ? 'drop' : 'add'}_index #{table.inspect}, #{cols.inspect}#{', :ignore_errors=>true' if options[:ignore_errors]}#{opts_inspect(c)}"
        else
          "index #{cols.inspect}#{opts_inspect(c)}"
        end
      end
      is = is.reverse if options[:drop_index]
      is.join("\n")
    end

foreign_key(name, table=nil, opts = {}) click to toggle source

Add a foreign key in the table that references another table to the DDL. See column for available options.

    foreign_key(:artist_id) # artist_id INTEGER
    foreign_key(:artist_id, :artists) # artist_id INTEGER REFERENCES artists
    foreign_key(:artist_id, :artists, :key=>:id) # artist_id INTEGER REFERENCES artists(id)
    foreign_key(:artist_id, :artists, :type=>String) # artist_id varchar(255) REFERENCES artists(id)

Additional Options:

:foreign_key_constraint_name | The name to give the foreign key constraint

If you want a foreign key constraint without adding a column (usually because it is a composite foreign key), you can provide an array of columns as the first argument, and you can provide the :name option to name the constraint:

    foreign_key([:artist_name, :artist_location], :artists, :name=>:artist_fk)
    # ADD CONSTRAINT artist_fk FOREIGN KEY (artist_name, artist_location) REFERENCES artists

    # File lib/sequel/database/schema_generator.rb, line 145
    def foreign_key(name, table=nil, opts = {})
      opts = case table
      when Hash
        table.merge(opts)
      when Symbol
        opts.merge(:table=>table)
      when NilClass
        opts
      else
        raise(Error, "The second argument to foreign_key should be a Hash, Symbol, or nil")
      end
      return composite_foreign_key(name, opts) if name.is_a?(Array)
      column(name, Integer, opts)
    end

full_text_index(columns, opts = {}) click to toggle source

Add a full text index on the given columns to the DDL.

PostgreSQL specific options:

:language | Set a language to use for the index (default: simple).

Microsoft SQL Server specific options:

:key_index | The KEY INDEX to use for the full text index.

    # File lib/sequel/database/schema_generator.rb, line 167
    def full_text_index(columns, opts = {})
      index(columns, opts.merge(:type => :full_text))
    end

has_column?(name) click to toggle source

True if the DDL includes the creation of a column with the given name.

    # File lib/sequel/database/schema_generator.rb, line 172
    def has_column?(name)
      columns.any?{|c| c[:name] == name}
    end

index(columns, opts = {}) click to toggle source

Add an index on the given column(s) with the given options to the DDL. General options:

:name | The name to use for the index. If not given, a default name based on the table and columns is used.
:type | The type of index to use (only supported by some databases)
:unique | Make the index unique, so duplicate values are not allowed.
:where | Create a partial index (only supported by some databases)

PostgreSQL specific options:

:concurrently | Create the index concurrently, so it doesn't block operations on the table while the index is being built.
:opclass | Use a specific operator class in the index.

Microsoft SQL Server specific options:

:include | Include additional column values in the index, without actually indexing on those values.

    index :name
    # CREATE INDEX table_name_index ON table (name)

    index [:artist_id, :name]
    # CREATE INDEX table_artist_id_name_index ON table (artist_id, name)

    # File lib/sequel/database/schema_generator.rb, line 202
    def index(columns, opts = {})
      indexes << {:columns => Array(columns)}.merge(opts)
    end

method_missing(type, name = nil, opts = {}) click to toggle source

Add a column with the given type, name, and opts to the DDL. See `column` for available options.

    # File lib/sequel/database/schema_generator.rb, line 208
    def method_missing(type, name = nil, opts = {})
      name ? column(name, type, opts) : super
    end

primary_key(name, *args) click to toggle source

Adds an autoincrementing primary key column or a primary key constraint to the DDL. To just create a constraint, the first argument should be an array of column symbols specifying the primary key columns. To create an autoincrementing primary key column, a single symbol can be used. In both cases, an options hash can be used as the second argument.

If you want to create a primary key column that is not autoincrementing, you should not use this method. Instead, you should use the regular `column` method with a `:primary_key=>true` option.

If an array of column symbols is used, you can specify the :name option to name the constraint.

Examples:

    primary_key(:id)
    primary_key([:street_number, :house_number], :name=>:some constraint_name)

    # File lib/sequel/database/schema_generator.rb, line 233
    def primary_key(name, *args)
      return composite_primary_key(name, *args) if name.is_a?(Array)
      @primary_key = @db.serial_primary_key_options.merge({:name => name})

      if opts = args.pop
        opts = {:type => opts} unless opts.is_a?(Hash)
        if type = args.pop
          opts.merge!(:type => type)
        end
        @primary_key.merge!(opts)
      end
      @primary_key
    end

primary_key_name() click to toggle source

The name of the primary key for this generator, if it has a primary key.

    # File lib/sequel/database/schema_generator.rb, line 248
    def primary_key_name
      @primary_key[:name] if @primary_key
    end

respond_to_missing?(meth, include_private) click to toggle source

This object responds to all methods.

    # File lib/sequel/database/schema_generator.rb, line 213
    def respond_to_missing?(meth, include_private)
      true
    end

spatial_index(columns, opts = {}) click to toggle source

Add a spatial index on the given columns to the DDL.

    # File lib/sequel/database/schema_generator.rb, line 253
    def spatial_index(columns, opts = {})
      index(columns, opts.merge(:type => :spatial))
    end

unique(columns, opts = {}) click to toggle source

Add a unique constraint on the given columns to the DDL.

    unique(:name) # UNIQUE (name)

Supports the same :deferrable option as column. The :name option can be used to name the constraint.

    # File lib/sequel/database/schema_generator.rb, line 263
    def unique(columns, opts = {})
      constraints << {:type => :unique, :columns => Array(columns)}.merge(opts)
    end

[Validate]

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