Need more explanation about Dictionary -- Dependent Field

[newhand]

HI everyone

Recently I realized a very strange problem，that is Dependent Field of the Dictionary 。

for example： " Assigned to" and  "assignment_group" of  incident table.

                         You can only select the users who are the members of the assignment group you selected,

                         just simply set "assignment_group" to "Dependent Field" of "Assigned to" field.

The problem is here,  i don't think i offered enought imformation to SNOW.

SO,

Why Snow knows to show only  the member of the group in  Assigned to field ? 

Why not show the members who are not the member of the group ? 

why not only show the manager of the group ?

Does it only can be used to control " Assigned to" and  "assignment_group" or some specific combination? 

I searched a lot about "Dependent Field"  but i can't find a resut to tell me exactly how it works.

I need more details about "Dependent Field" 

NEED HELP！！！

[SatyakiBose]

Hello @newhand 

Thats a nice question.

Even I tried to check the business rules and script include which could explain how the dependent field works, but did not find anything.

However, I found that there are other fields on the task table which are dependent.

You can find the list here: https://xxxx.service-now.com/sys_dictionary_list.do?sysparm_query=nameSTARTSWITHtask%5Edependent_on_...

@Chuck Tomasi @Pranav Bhagat any inputs from your side?

[newhand · Accepted solution]

HI@SatyakiBose 

Thank for your reply.

I guess, reference tableA and the table refereneces to tableA (TableB)  , must have a same field( field name and type or only name?) then the field can be set to " Dependent Field ".

When using  Dependent Field , TableA will show only the records which have the save value with the current record of  TableB.

[newhand]

I tried my guess and it seems to be correct.

Then some types of fields cannot take effect (such as Time type)。