ruby on rails - How to parse param comma separated string ids to has_many mongoid field -

ruby on rails - How to parse param comma separated string ids to has_many mongoid field -

how handle tag_ids in post params save in related model? utilize post_params method.

has_many :tags def post_params params.require(:post).permit(:title, :message, :tag_ids) end #parameters: {"post"=>{"title"=>"asdf", "message"=>"asfd", "tag_ids"=>"543d727a4261729ecd000000,543d8a914261729ecd010000"}}

i've got:

mongoid::errors::invalidvalue - problem: value of type string cannot written field of type array

i found solution don't it, in post model i've added:

def tag_ids=str str.split(',').each |id| t = tag.find(id) self.tags << t end end

i think have modify incoming info in tag_ids in create action in controller.

so when receive data, before saving info db by, example: post.create! should add together parsing postscontroller action create:

if want array of string:

post.tag_ids = params[tag_ids]split(",")

or if want array of integers:

post.tag_ids = params[tag_ids]split(",").map(&:to_i)

ruby-on-rails ruby-on-rails-4 mongoid strong-parameters