Rails：从一个查询中搜索多个表

Question

How do I write condition statement in find or paginate method to allow users search in Project and Project Category names simultaneously?

Now my code looks like this

@projects = Project.paginate :per_page => 20, :page => params[:page], :conditions => ['name LIKE ?', "%#{params[:search]}%"]

So I have also Category table with name field. How do I combine those two name s together in this search query?

Answer 1

Assuming that your Project model has_many:categories :

@projects = Project.paginate:per_page => 20, :page => params[:page], :joins =>:categories, :conditions => ['projects.name LIKE? OR categories.name LIKE?', "%#{params[:search]}%", "%#{params[:search]}%"], :order => 'projects.id DESC'

Change the :order above if/as needed.

Answer 2

I would do:

@categories = Category.find :conditions => ["name like ?", "%#{params[:search]}%"]

Concatenate @projects and @categories, and then use the result as the final search result list.