[Question] How can I implement a redirect editor deduplicated by fromUrl?

[tian-lan-landing]

Background

I wanted to enable configuring URL redirects, e.g.

• /very-long-path -> /vlp
• /deprecated-page -> /

I was able to create a configuration page by either collections or a singleton with array of object(fromUrl, toUrl) field.

Problem

However, I was not able to find a way to deduplicate by fromUrl field. E.g.

• /very-long-path -> /vlp
• /deprecated-page -> /
• /very-long-path -> / (Adding this does not make sense, as it conflicts with the first config. But it is allowed from the UI)

My question is: How do I deduplicate my collections or array items with a specific field value?
When there are more entries it's hard to find duplicates so it's better to have a programatic way.
My current workaround is to run a ci check for duplications, but it's better if we know that when we are editing it.

Possible solutions

• Validation function across array items
• A fields.map type that allows user enter key and value, and key must be unique.