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Override The override functionality allows you to change the column values value and attributes in the child tables extended from the base tablestable. For example, a column override changes the default value of the Impact field from Low in the Task table to Medium in the Incident table.

Tip

Role required: admin.

How to define

To create a column override, complete the following steps:

  1. Navigate to to System Definition → Settings → Column Overrides.
  2. Click New and fill in the fields.
  3. Click Save or Save and Exitexit to apply the changes.

Override example

As an example, you may need to override some column where the base table and the child table are the same. This can help as a workaround in case you need to change some protected column options before they are changed correctly.

Note

When doing this, keep in mind that inaccurate changes can harm your system, so double-check, and, if possible, verify first on some testing instance.

To perform such override, fill in the fields as described below:

  1. Base Table – select a base table.
  2. Table – select the same table.
  3. Column – select a column you need to override.
  4. Specify an attribute you are going to override. The following column attributes can be overridden:
    1. Mandatory
    2. Read Only
    3. Display by Ref
    4. Reference Qualifier
    5. Dependent on Column
    6. Default Value.
  5. Specify new attribute value.
  6. Click Save or Save and Exit to apply changes.

The screenshot below shows the Mandatory attribute overriding of the IT Service column related to the Agreement table.

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Defining an override for choice fields

When creating a field of Choice-like type (for example, Choice), it is recommended to set text values in the Value field to increase code readability. For example, it can be Incoming, Active, or Failed values.

As for task states, it makes sense to make values numeric; this can help with selection construction in code

Column Override form fields

FieldMandatoryDescription
Base tableY

Select a table containing the field to override.

TableYSelect the child table that will be affected by overriding.
ColumnYSelect a column to be overridden.
Display by ref overrideNSelect this checkbox to use the values of the Column as the Display Name in Reference fields that refer to the Table.

Default value override

N

Select this checkbox to display the Default value field.

FieldMandatoryDescription
Default ValueN

Enter the default value that will override the original one.


Note

Note that using the override functionality for read-only fields that have the dynamic default value may cause validation errors.

As a workaround, you can set a read-only attribute for these fields with a client script using the SimpleForm methods.


Dependent on column overrideN

Select this checkbox to display the Dependent on column field.

FieldMandatoryDescription
Dependent on column NDefine the column on which the current field depends.


Reference qualifier overrideN

Select the checkbox to display the Reference Qualifiers field set, which overrides the reference qualifier for the field on the extended table.

FieldMandatoryDescription
ReferenceYSelect a table that the overriding column refers to.
Reference qualifier typeN

Select the reference qualifier type. Available options:

  • Simple
  • Dynamic
Reference qualifier conditionNBuild a reference filter that will meet the necessary conditions.
Dynamic reference qualifierN

Select the reference qualifier type from the table.

This field appears when the Reference qualifier type field value is Dynamic.


Title overrideN

Select the checkbox to display the Title field, which overrides the field title in the extended table. That is, a child table will inherit the properties of the parent table's column, but the title will be different.

FieldMandatoryDescription
TitleNEnter a new title of the column.


Mandatory overrideNSelect the checkbox to display the Mandatory checkbox that overrides the behavior when the field on the extended table must contain a value to save a record.
Read only overrideN

Select this checkbox to display the Read only checkbox that overrides the behavior when a user can change the field value in the extended table.

Override example

For example, you need to override the Email field in the User (user) table. The field should be non-mandatory and have a new title Work mail in the Employee (employee) table. At the same time, the Email field on the User form must remain mandatory with the same title.

To create the appropriate override, complete the following steps:

  1. Create an override entry via the navigator menu or the Related List of the Email column record.
  2. In the Table field, select the level at which the override will be performed. All tables containing the column are available for the selection.
  3. Select the Mandatory override checkbox and specify a new mandatory value. In this case, leave the Mandatory checkbox clear.
  4. Select the Title override checkbox and enter a new title value in the Title field.
  5. Save the record.
Warning

When doing so, keep in mind that incorrect changes may harm your system, so double-check the changes and verify them on a test instance if possible.


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