Why is the Display value of some fields set to false, but this field is displayed in the table that references him?

[Peter64]

Like the display of the context field in the wf_history table

[Tony Chatfield1]

Hi, how the default display value of a reference field is set can be found here.

https://docs.servicenow.com/bundle/rome-platform-administration/page/administer/field-administration/task/t_SelectTheDisplayValue.html?cshalt=yes

In your example, the context field of wf_history shows the 'name' of the record from referenced wf_context table.

[Peter64]

But the wf_context table does not set any field Display value to true.

[Tony Chatfield1 · Accepted solution]

A reference field must have a display value and as the docs indicate if no field is set to display = true, the platform checks for other values.

Reference fields look for the display value in the following order:

1. A field with display=true in the system dictionary on the lowest sub-table for extended tables.
2. A field with display=true in the system dictionary on the parent table.
3. A field named name or u_name.
4. The Created on field of the referenced record.

[Peter64]

Thanks for your answer!