'subquery must return only one column' error

I have a simple users table, and a friends table with foreign keys user_id_1 and user_id_2.

In a seed, I add some users. In another seed I want to add some friend relationships by doing that.

knex('friends').insert({
  user_id_1: knex('users').select('id').where({username: 'bla'}),
  user_id_2: knex('users').select('id').where({username: 'blu'}),
})

This gives me back an error that subquery must return only one column. I select just the id column, so what is the problem here?

[elhigu]

@coockoo looks like you are right https://runkit.com/embed/htzh2gkncj8n I was running 0.12.6 which still generated invalid output.

[pvinis]

it was faulty code indeed, and thats why i answered it, for future reference 😄

good to know about clearSelect. well, i dont know if it should clear by default or no. i just thought i will ask, to know, if people know the reason, or to start a conversation, if people dont know the reason. i guess it makes send to have it explicitly like it is now.

thank you for your answer 😃