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Pre-filling default values in a form lets you do things like: Pre-fill defaults: when a store submits a form task, auto-fill the store’s info so they don’t fat-finger it. Tag the submission channel: when a user signs up, auto-fill a Source channel column.
📌 Use the link generator to bulk-create pre-fill links: https://store.dingtalk.io/materials/659

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Basics

Format: Single question: <form share link>?prefill_<question name>=<value>. Multiple questions: <form share link>?prefill_<question name>=<value>&prefill_<question name>=<value>. Example: https://alidocs.dingtalk.com/notable/share/form/v011GXn4BrXGJobODQ4_hERWDMS_7LisUkm?prefill_标题=预设标题&prefill_单选=选项二 Question types that support defaults: text, number, single-select, multi-select.
Question typeFormat
Text<form link>?prefill_Channel=WeChat
Number<form link>?prefill_Score=1
Single / multi-select<form link>?prefill_Pick=Sneakers
If your default contains special characters, encode them per the table:
CharacterEncoded
Space%20 or +
;%3B
:%3A
\[%5B
(%28
)%29
&%26
\$%24
,%2C
！%21
@%40
]%5D
{%7B
}%7D
#%23
If you don’t want a pre-filled question to show on the form, add &hide_<question name>=1 to the link. Example: hide the Reviewer field on a content-submission form: Form link?prefill_Reviewer=Kato&hide_ProjectOwner=1 This trick also lets you trace submission channels. Say you’re collecting feedback on an event and want to know which channel produced the most submissions:
  1. Add a question called Submission platform.
  2. Open form sharing, set the audience, and copy the share link.
  3. Add a source param to the link. If the source is DingTalk: <form link>?prefill_SubmissionPlatform=DingTalk&hide_SubmissionPlatform=1
  4. Share each variant to a different platform.
The pre-filled default lets you trace exactly where each submission came from.

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FAQ

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Q: Will my pre-filled defaults break if I rename the question?

A: Yes — the link breaks. Rebuild it with the new question name.

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Q: Why doesn’t a pre-filled person name take effect in an AI Table form?

A: A few possibilities:
  • The name is a duplicate within the org.
  • The person is external and not in your DingTalk contacts.
  • The name is misspelled — double-check.

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Q: After setting a default in an AI Table form, will every respondent see it?

A: Yes. To hide it, add &hide_<question name>=1 to the link.

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Q: I added the hide param but the question still shows on the form. Why?

A: Likely the field is required and the default didn’t take. With an invalid default, the required field stays empty, so it can’t be hidden. Re-do the default.