Class | Hash |
In: |
lib/sequel/extensions/pg_hstore.rb
lib/sequel/extensions/pg_json.rb lib/sequel/extensions/core_extensions.rb |
Parent: | Object |
Return a Sequel::SQL::BooleanExpression created from this hash, matching all of the conditions in this hash and the condition specified by the given argument.
{:a=>1} & :b # SQL: a = 1 AND b {:a=>true} & ~:b # SQL: a IS TRUE AND NOT b
# File lib/sequel/extensions/core_extensions.rb, line 108 108: def &(ce) 109: ::Sequel::SQL::BooleanExpression.new(:AND, self, ce) 110: end
Return a Sequel::SQL::CaseExpression with this hash as the conditions and the given default value. Note that the order of the conditions will be arbitrary on ruby 1.8, so all conditions should be orthogonal.
{{:a=>[2,3]}=>1}.case(0) # SQL: CASE WHEN a IN (2, 3) THEN 1 ELSE 0 END {:a=>1, :b=>2}.case(:d, :c) # SQL: CASE c WHEN a THEN 1 WHEN b THEN 2 ELSE d END # or: CASE c WHEN b THEN 2 WHEN a THEN 1 ELSE d END
# File lib/sequel/extensions/core_extensions.rb, line 138 138: def case(*args) 139: ::Sequel::SQL::CaseExpression.new(to_a, *args) 140: end
Create a new HStore using the receiver as the input hash. Note that the HStore created will not use the receiver as the backing store, since it has to modify the hash. To get the new backing store, use:
hash.hstore.to_hash
# File lib/sequel/extensions/pg_hstore.rb, line 309 309: def hstore 310: Sequel::Postgres::HStore.new(self) 311: end
Return a Sequel::Postgres::JSONHash proxy to the receiver. This is mostly useful as a short cut for creating JSONHash objects that didn‘t come from the database.
# File lib/sequel/extensions/pg_json.rb, line 204 204: def pg_json 205: Sequel::Postgres::JSONHash.new(self) 206: end
Return a Sequel::SQL::BooleanExpression created from this hash, matching all of the conditions. Rarely do you need to call this explicitly, as Sequel generally assumes that hashes specify this type of condition.
{:a=>true}.sql_expr # SQL: a IS TRUE {:a=>1, :b=>[2, 3]}.sql_expr # SQL: a = 1 AND b IN (2, 3)
# File lib/sequel/extensions/core_extensions.rb, line 148 148: def sql_expr 149: ::Sequel::SQL::BooleanExpression.from_value_pairs(self) 150: end
Return a Sequel::SQL::BooleanExpression created from this hash, matching none of the conditions.
{:a=>true}.sql_negate # SQL: a IS NOT TRUE {:a=>1, :b=>[2, 3]}.sql_negate # SQL: a != 1 AND b NOT IN (2, 3)
# File lib/sequel/extensions/core_extensions.rb, line 157 157: def sql_negate 158: ::Sequel::SQL::BooleanExpression.from_value_pairs(self, :AND, true) 159: end
Return a Sequel::SQL::BooleanExpression created from this hash, matching any of the conditions.
{:a=>true}.sql_or # SQL: a IS TRUE {:a=>1, :b=>[2, 3]}.sql_or # SQL: a = 1 OR b IN (2, 3)
# File lib/sequel/extensions/core_extensions.rb, line 166 166: def sql_or 167: ::Sequel::SQL::BooleanExpression.from_value_pairs(self, :OR) 168: end
Return a Sequel::SQL::BooleanExpression created from this hash, matching all of the conditions in this hash or the condition specified by the given argument.
{:a=>1} | :b # SQL: a = 1 OR b {:a=>true} | ~:b # SQL: a IS TRUE OR NOT b
# File lib/sequel/extensions/core_extensions.rb, line 118 118: def |(ce) 119: ::Sequel::SQL::BooleanExpression.new(:OR, self, ce) 120: end
Return a Sequel::SQL::BooleanExpression created from this hash, not matching all of the conditions.
~{:a=>true} # SQL: a IS NOT TRUE ~{:a=>1, :b=>[2, 3]} # SQL: a != 1 OR b NOT IN (2, 3)
# File lib/sequel/extensions/core_extensions.rb, line 127 127: def ~ 128: ::Sequel::SQL::BooleanExpression.from_value_pairs(self, :OR, true) 129: end