BuildEntity 方法利用针对指定用户数据库的唯一标识创建新的 Entity 对象,并启动针对该记录的提交操作。在提交操作期间,该记录可用于编辑 Entity 对象中的缺省值。
如果您使用 BuildEntity 创建了 Entity 对象,但尚未将其落实到数据库,那么该对象是可编辑的。
BuildEntity 方法会创建指定类型的新记录然后开始提交操作,这使您可以开始编辑记录的内容。(您不需要调用 EditEntity 以使记录为可编辑)。您可以使用所返回 Entity 对象的 SetFieldValue 方法为新记录的字段赋值。完成更新记录后,请分别使用 Entity 对象的 Validate 和 Commit 方法来验证和落实对记录所做的任何更改。 在 entitydef_name 参数中指定的名称还必须对应于模式中适当的记录类型。要获取 entitydef_name 的合法名称的列表,请使用 GetSubmitEntityDefNames 方法。
$session->BuildEntity(entity_def_name);
# Build Session object... # Create a new "defect" record $entityobj = $sessionobj->BuildEntity("defect");
调用 BuildEntity 方法后,您可以调用 Entity 对象的方法来设置本教程上一课中所描述记录中的字段值。
要创建新记录:
以下示例演示如何处理有状态和无状态记录类型。
您的模式具有无状态记录,如“项目”,以及有状态记录(可从一种状态转变为另一种),如“缺陷”。Rational ClearQuest API 使您能够获取和设置这两种类型记录的字段值。 以下示例包括两个子例程:针对无状态记录的 No_state 和针对有状态记录的 Has_state。
sub myValidateCommit( $entity ){ $status = $entity->Validate; if ( $status ) { $entity->Revert; # for simplicity, we die on any error, you should do what makes sense in your # application if recovery is possible. die "Error validating: $status \n"; } else { $entity->Commit; } }
sub No_state { my($session) = @_; my($entity); my($failure); print "Test for stateless entities is starting"; print "submit a stateless entity"; $entity = $session->BuildEntity("project"); # ignore failure $failure = $entity->SetFieldValue("name", "initial project name"); DumpFields($entity); myValidateCommit( $entity ); $entity = ""; print "Reload, show values before modification"; # Note that the Entity->Reload method can be used to force a refresh of the entity from the database. $entity = $session->GetEntity("project", "initial project name"); DumpFields($entity); print "Modify, then show new values"; $session->EditEntity($entity, "modify"); # ignore the failure $failure = $entity->SetFieldValue("name", "modified project name"); DumpFields($entity); print "revert, then show restored values"; $entity->Revert(); DumpFields($entity); print "Modify again, and commit"; $session->EditEntity($entity, "modify"); # ignore failure $failure = $entity->SetFieldValue("name", "final project name"); myValidateCommit( $entity ); $entity = ""; print "Reload, and show final result"; $entity = $session->GetEntity("project", "final project name"); DumpFields($entity); $entity = ""; print "Test for stateless entities is done"; }
sub Has_states { my($session) = @_; my($entity); # the entity that is stateful # failure message from functions that return strings my($failure); my($id); # Rational ClearQuest defect database ID print "Test for stateful entities is starting"; print "submit a stateful entity"; $entity = $session->BuildEntity("defect"); # ignore failures $failure = $entity->SetFieldValue("headline", "man bites dog!"); $failure = $entity->SetFieldValue("project", "final project name"); $failure = $entity->SetFieldValue("submit_date", "03/18/2000 10:09:08"); $id = $entity->GetDbId(); open(FILE, ">>XXStdout"); print FILE, "Entity id is", $id, "\n"; close FILE; DumpFields($entity); myValidateCommit( $entity ); $entity = ""; print "Reload, show values before modification"; # Note that the Entity->Reload method can be used to force a refresh of the entity from the database. $entity = $session->GetEntityByDbId("defect", $id); DumpFields($entity); print "Modify then show new values"; $session->EditEntity($entity, "modify"); # ignore failure $failure = $entity->SetFieldValue("headline", "man bites tree!"); DumpFields($entity); print "revert, then show restored values"; $entity->Revert(); DumpFields($entity); print "Modify again and commit"; $session->EditEntity($entity, "modify"); # ignore failure $failure = $entity->SetFieldValue("headline", "tree bites man!"); myValidateCommit( $entity ); $entity = ""; print "Reload and show before changing state"; $entity = $session->GetEntityByDbId("defect", $id); DumpFields($entity); print "Change to new state, then show new values"; $session->EditEntity($entity, "close"); $failure = $entity->SetFieldValue("description", "looked like an oak tree"); # ignore failure DumpFields($entity); print "revert then show restored values"; $entity->Revert(); DumpFields($entity); print "Change to new state again then commit"; $session->EditEntity($entity, "close"); $failure = $entity->SetFieldValue("description", "man of steel, tree of maple"); # ignore failure myValidateCommit( $entity ); $entity = ""; print "Reload, show final values"; $entity = $session->GetEntityByDbId("defect", $id); DumpFields($entity); $entity = ""; print "Test of stateful entities is done"; }