How do you define an array field when using create in mongoid?

Question

I'm trying to create a seed file to populate my mongo database. The following syntax creates a nil value when I try to define the array field value. I'm using mongoid v3.0.9. What am I doing wrong?

These following examples do not work when I put them in the seed file:

User.create(name:'name', test_array_field:'[123,123]')
User.create(name:'name', test_array_field:[123,123])
User.create(name:'name', test_array_field:[123,123].to_a)

I've defined the field in my class like so:

field :test_array_field, type: Array

Sergio Tulentsev · Accepted Answer · 2012-10-28 21:35:52Z

7

Your second syntax works for me.

class User
  field :roles, type: Array, default: []
end

u = User.create roles: ['superadmin']
u.new_record? # => false
u.roles # => ["superadmin"]

answered Oct 28, 2012 at 21:35

Sergio Tulentsev

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3 Comments

perseverance Over a year ago

Can you try putting the User.create into a seed file and running it?

Sergio Tulentsev Over a year ago

Can you do the reverse? Try it in your console?

perseverance Over a year ago

I've already tried it in my console and it works like it works with you. Its only when its in a seed.rb file that it doesn't work.

Stoic · Accepted Answer · 2014-04-10 06:10:38Z

4

Try this:

class Foo
  include Mongoid::Document

  field :bar, :type => Array, :default => []
  field :baz, :type => Hash, :default => {}
end

edited Apr 10, 2014 at 6:10

Stoic

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answered Apr 9, 2014 at 12:35

nagendra

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