Relations in X++

 There are four types of relations:

  1. Normal Relation.

  2. Field Fixed Relation.

  3. Related Field Fixed Relation.

  4. ForeignKey Relation.


Normal Relation:

  Normal Relation is to specify relation fields without conditions.

Field Fixed Relation:

  • Field fixed Relation is to specify relation fields to restrict the records in the primary table(Parent Table).
  • Only  the records that meet the condition are selected.
  • The field fixed is  normally an enum.
Example:

                     Field Fixed :- Table.Field == <EnumValue>

Related Field Fixed Relation:
  • Related field fixed to specify relation fields that restrict the records in the related table.
  • Only  the records that meet the condition are selected.
  • The field fixed is  normally an enum.
Example:
                 Related field fixed :- (<EnumValue> == Table.Field)

ForeignKey Relation:
  • ForeignKey to specify a correspondence between a foreign key field in the present table to the primary key field in another parent table.

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