dataClass.{attributeName}

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4D v19.8


dataClass.{attributeName} -> dataClass.<attributeName>

Parameter	Type	Description
dataClass.<attributeName>	DataClassAttribute	Dataclass attribute description

Description

The attributes of dataclasses are objects that are available directly as properties of these classes.

The returned objects are of the DataClassAttribute type. These objects have properties that you can read to get information about your dataclass attributes. These properties are listed in the ORDA - DataClassAttribute section.

Note: Dataclass attribute objects can be modified, but the underlying database structure will not be altered.

Example 1

 $salary:=ds.Employee.salary //returns the salary attribute in the Employee dataclass

 $compCity:=ds.Company["city"] //returns the city attribute in the Company dataclass

Example 2

Considering the following database structure:

 C_OBJECT($firstnameAtt;$employerAtt;$employeesAtt)

 

 $firstnameAtt:=ds.Employee.firstname

  //{name:firstname,kind:storage,fieldType:0,type:string,fieldNumber:2,indexed:true,

  //keywordIndexed:false,autoFilled:false,mandatory:false,unique:false}

 

 $employerAtt:=ds.Employee.employer

  //{name:employer,kind:relatedEntity,relatedDataClass:Company,

  //fieldType:38,type:Company,inverseName:employees}

  //38=Is object

 

 $employeesAtt:=ds.Company.employees

  //{name:employees,kind:relatedEntities,relatedDataClass:Employee,

  //fieldType:42,type:EmployeeSelection,inverseName:employer}

  //42=Is collection

Example 3

Considering the following table properties:

 C_OBJECT($sequenceNumberAtt)

 $sequenceNumberAtt=ds.Employee.sequenceNumber

  //{name:sequenceNumber,kind:storage,fieldType:0,type:string,fieldNumber:13,

  //indexed:true,keywordIndexed:false,autoFilled:true,mandatory:false,unique:true}