rails, postgres and jsonb. query doesn't find records

Question

I can't get my query to find relevant records.

here's my test record:

model: Submission
column name: contents (jsonb)

record is created by: Submission.create(contents: {ada: 'ada'})

here's the query: Submission.where("contents->>'ada'='ada'").first

results is nil

record is in database and (lets assume record id=1)

Submission.find(1).contents[:ada]=='ada'

results in true

Answer 1

试试以下，参考this

Submission.where('contents @> ?', {ada: 'ada'}.to_json)

Answer 2

Ok, so I'm still not exactly sure what's going on but the problem was in the fact that I was assigning a default values of {} in my migration. when this default assignment is removed everything works as expected.