EntityDAC

TCustomEntityContext.GetEntities Method

The method is designed for retrieving an entity collection by specified criteria.

Class

TCustomEntityContext

Syntax

function GetEntities(MetaExpr: IMetaType): IEntityEnumerable; overload;

Parameters
MetaExpr
The meta-type of entities to be retrieved.

Remarks

The method returns a collection that contains all entities of the specified meta-type. Collection members created by this method are initially attached to the data context and placed to the object cache, therefore you can already perform modification operations for them: TCustomEntityContext.Delete, TCustomEntityContext.Save, TCustomEntityContext.Cancel without pre-calling TCustomEntityContext.Attach. In addition, these entity instances will be automatically destroyed, and there will be no need to provide for their manual destruction.

Example

Examples of calling the method:

var
  EmpType: IMetaType;
  EmpEntities: IEntityEnumerable;
begin
  EmpType := Context['Emp'];
  EmpEntities := Context.GetEntities(EmpType);
  // ...
end; 

See Also

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