如何在Rails中创建具有关联的数据输入？

Question

Now I have models of users and their articles. However, how do I implement the articles controller so that it keeps track of which user is the author? Should I pass a parameter back or is there any API to use?

Answer 1

In article model ,

belongs_to :user

and in user model,

has_many :articles

Now , you have one to many relation , from user to article . Just add an attribute author in user table. This is how u can apply the logic

Answer 2

in app/models/article.rb

belongs_to :user

in app/models/user.rb

has_many :articles

and in controller(new action) you will write

current_user.articles.new

or

current_user.articles.build

and in controller(create action) you will write

current_user.articles.create(params[:article])

or

article = current_user.articles.build

article.attributes = params[:article]

and if you want to fetch only user's articles then you will do in edit action

current_user.articles.find(params[:id]), where params[:id] is article id which is to be edited.

and in controller(update action) you will write

article = current_user.articles.find(params[:id])

article.update_attributes(params[:article])