Invalid query. You cannot use more than one 'in' filter

问题

this.ref.collection("users", ref => ref.where("uid1","in", [reciverId, senderId])
        .where("uid2","in", [reciverId, senderId]))

give me error like

"Invalid query. You cannot use more than one 'in' filter"

回答1:

This is indeed a limitation of Firestore, as explained in the documentation:

Limitations

Note the following limitations for in and array-contains-any:

• in and array-contains-any support up to 10 comparison values.
• You can use only one in or array-contains-any clause per query. You can't use both in and array-contains-any in the same query.
• You can combine array-contains with in but not with array-contains-any.

来源：https://stackoverflow.com/questions/60474746/invalid-query-you-cannot-use-more-than-one-in-filter