Create an array before saving/validation

Question

I'm using selectize gem for this task and can't understand how to add values without {} to those would be saved correctly. I have array: true on this column, so values must be sent in an array, not the string.

I tried convert this attribute before saving of record, but still no result.

class Post < ActiveRecord::Base
  before_validation :convert_to_array

  def convert_to_array
    self.tags = tags.split(",")
  end
end

Error

ERROR:  malformed array literal: "{{}}"

If there aren't callbacks

    Parameters: {"post"=>{"title"=>"Aliquam laborum consequatur voluptatem quo.",
"tags"=>"asdas,zxzx"}, "_wysihtml5_mode"=>"1", "commit"=>"Save", "id"=>"4"}

show the migration of the model ...Post ,, for the column tags. — Arup Rakshit
– Arup Rakshit, Commented Aug 23, 2015 at 13:38
from where you are getting the value of tags here tags.split — Arup Rakshit
– Arup Rakshit, Commented Aug 23, 2015 at 13:51
can you override the setter method for tags attribute and set the tag after splitting.? — Athar
– Athar, Commented Aug 23, 2015 at 13:58

K M Rakibul Islam · Accepted Answer · 2015-08-23 13:53:15Z

1

You can do this in the controller (because params is not available in your model):

tags = params['post']['tags'].split(',')
@post = Post.new
@post.update_attributes(tags: tags)

edited Aug 23, 2015 at 13:53

answered Aug 23, 2015 at 13:51

K M Rakibul Islam

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4 Comments

Arup Rakshit Over a year ago

Yes.. I have the same doubt.

K M Rakibul Islam Over a year ago

Yeah, params is not available to the model.

Vitalii Over a year ago

@post.update_attribute(:tags, tags) I guess. Thank you, it works for me.

K M Rakibul Islam Over a year ago

Both should work. I used update_attributes because it will run the validation. Whereas update_attribute doesn't validate the record.

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