有很多不符合我的观点

Question

I'm trying to get my has_many working.

I've two models:

project:

• name:string
• desc:text
• tags:references

project has_many :tags

tags:

• name:string

tags belongs_to :project

my project_controller:

def new
  @project = Project.new
  @project.tags = Tags.new
end

but what is the right view? I tried something like this:

= form_for @project do |f|
 = f.text_field :title
 = f.text_area :desc

 = f.fields_for :tags, @project.tags do |f_tags|
   = f_tags.text_field :name, placeholder: 'Tag-Name'

But I get a error like this: undefined method 'name' for # <Tag::ActiveRecord_Associations_CollectionProxy:0x00007f4456cc7148>

I didn't get my mistake.

And how I can add multiple tags? My idea was to duplicate the div where the tag are.

Answer 1

I think you want to call build on your tags relation, and then not pass tag objects to your fields_for .

Controller:

def new
  @project = Project.new
  @project.tags.build
end

View:

= f.fields_for :tags do |f_tags|