rails 5 enum where “like”

问题

I'm trying to query an activerecord model enum and use the like operator in the where method, and it just doesnt work. Is there some trick to allow me to query an enum this way? Works fine on regular columns. Here it is in the console.

Regular string column (title) works as shown below

irb(main):092:0> Proposal.select(:id,:department,:status).where('title like "test%"')
Proposal Load (0.3ms)  SELECT  "proposals"."id", "proposals"."department", "proposals"."status" FROM "proposals" WHERE (title like "test%") LIMIT ?  [["LIMIT", 11]]
=> #<ActiveRecord::Relation [#<Proposal id: 7, department: 1, status: "In Progress">, #<Proposal id: 61, department: 2, status: "Won">]>

However, trying it on an enum, gives no results.

irb(main):094:0> Proposal.select(:department,:status).where('status like "Wo%"')
Proposal Load (0.3ms)  SELECT  "proposals"."department", "proposals"."status" FROM "proposals" WHERE (status like "Wo%") LIMIT ?  [["LIMIT", 11]]
=> #<ActiveRecord::Relation []>

Any idea why I can't use like operator on enum? I'm trying to use this to filter a view with datatables.net server side processing.

回答1:

Enum stores data as integer like 0,1,2,3... Then rails map number to enum value defined in model. That is the reason why you doesn't get result

来源：https://stackoverflow.com/questions/46079147/rails-5-enum-where-like