You should be able to with text fields (see what I did in your example app)
Yes I see, but how did you do that? It doesnât work for me when I try to search for the emailâŚ
Built in fields wonât work 
I did it by changing the search field to text so that I can search the name field. However⌠I just tried the unique id (a built-in field) and that does work⌠Is there a reason we canât search the built-in email field for a User when working with User field types in App Data?
Yes, we havenât added that as it wouldnât really make sense to search on email since the view would at most return one entry. You can use the quick search bar for this.
Gaby, Do you mean you changed the search field to ânameâ (which is a text field)? That does work for me, but you donât get email in the linked data, you get name. So Iâm not understanding I guess, because I canât get that email to show up in the linked data type as you did.
Right, thatâs what I did in order to select the user, but then in order to display the email in your data view, change it back to email. That search field functions both as the field to search and the field to display.
@emmanuel Is the intended design to not allow linking of data types via number fields?
Sorry, i donât understand the question.
to not allow linking of data types via number fields
What does that mean?
So Iâm trying to link two data types via a field that has a type of ânumberâ. When I search for that field to link, it doesnât return in the search. Only text fields are able to be searched and linked.
If you can share a link to your app itâd be helpful.
Yeah it turns out itâs a limitation of our search autocomplete, we shouldnât show number fields. Weâll put that on our list, but anything that touches database isnât a small project.
We found a way to fix it, you can now type a number.
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Awesome! I tested it does work! Thank you!
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Iâm struggling with this⌠I canât write the data type field value because the input is text and my data field type is Company, not text.
Hereâs a more detailed version:
On signup, users create a team and a company. Because I want these fields to be linked in the way you described above, on data type Team I have a field name of Company and a field type of Company. However, because the user enters this information in a signup form the input content format is text. So in my workflow I canât write to Company because the expression evaluates to text, but the type is Company. Does this make sense?
I also tried this method to write to the Company field in the Teams data type, but it didnât work.
âŚ
Just checking some assumptions: When the data typeâs field type is text, this is not a direct link, and thus the linkage is not complete in some wayâŚ? If no, then why bother to use custom field types?