ModificationRule (Property)

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ModificationRule (Property)

In french: RègleModification

The ModificationRule property is used to configure the modification rule (integrity management) to be applied to the data file described in the code. You can:

Find out the modification rule used for a data file defined in the analysis or by programming.
Define the modification rule used for a data file (when the link is described by programming).

Versions 17 and later

This property is now available for iPhone/iPad applications.

New in version 17

This property is now available for iPhone/iPad applications.

Versions 18 and later

This property is now available in Windows Store apps mode.

New in version 18

This property is now available in Windows Store apps mode.

Versions 21 and later

This property is now available in Universal Windows 10 App mode.

New in version 21

This property is now available in Universal Windows 10 App mode.

Example

// Define the modification rule used in the OrdLine link
OrdLine.ModificationRule = hIntegrityForbidden
...
// Validate the data file description
HDescribeFile(OrdLine)

Syntax

Finding out the modification rule Hide the details

<Modification rule> = <Binding>.ModificationRule

<Modification rule>: Integer constant

The different modification rules are as follows:
hIntegrityCascade Cascading modification: all the linked records are modified in cascade when the key item is modified in the source file.
hIntegrityDefaultValue Default modification: the linked keys are initialized with their default value when the key item is modified in the source file.
hIntegrityForbidden Modification not allowed: the key item cannot be modified in the source file if the record is linked to another record.
hIntegrityNone No integrity management: no specific action is performed in the linked file when the key item is modified in the source file of the link.

<Binding>: Character string

Name of the link defined in the analysis or by the Link description type.

Defining the modification rule used in the link defined through programming Hide the details

<Binding>.ModificationRule = <Modification rule>

<Binding>: Character string

Name of the link defined in the analysis or by the Link description type.

<Modification rule>: Integer constant

The different modification rules are as follows:
hIntegrityCascade Cascading modification: all the linked records are modified in cascade when the key item is modified in the source file.
hIntegrityDefaultValue Default modification: the linked keys are initialized with their default value when the key item is modified in the source file.
hIntegrityForbidden Modification not allowed: the key item cannot be modified in the source file if the record is linked to another record.
hIntegrityNone No integrity management: no specific action is performed in the linked file when the key item is modified in the source file of the link.