EntityDAC

TCustomEntityContext.GetEntities

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

Unit

Syntax

Remarks

The method returns an entity collection by the specified LINQ query. 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;
  Expression: ILinqQueryable;
  EmpEntities: IEntityEnumerable;
begin
  EmpType := Context['Emp'];
  Expression := Context.From(EmpType).Where(EmpType['Deptno'] = 20).Select;
  EmpEntities := Context.GetEntities(Expression);
  // ...
end; 

See Also

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