Hi there, I'm very new to RoR please be kind.
I wasn't sure where to go but I was hoping I could find help here after
days of hair pulling. Stackoverflow was not successful.
I have followed the Official Beginners Guide to ROR and made a blog.
I wanted to take it further and add a tagging system to the blog. Im
getting errors and I don't have enough knowledge of ruby to determine what
is causing them. Any thoughts/help would be really appreciated.
So this is the error
ActiveRecord::StatementInvalid in Posts#show
Showing */home/nadia/blog/app/views/posts/show.html.erb* where line *#8*
raised:
SQLite3::SQLException: no such column: taggings.post_id: SELECT "tags".*
FROM "tags" INNER JOIN "taggings" ON "tags"."id" = "taggings"."tag_id"
WHERE "taggings"."post_id" = ?
Extracted source (around line *#8*):
6<p>
7Tags:
8<% @post.tags.each do |tag| %>
9<%= link_to tag.name, tag_path(tag) %>
10<% end %>
11</p>
And this a small chunk of the
post_controller:
def new
27 @post = Post.new
28 end
29 def create
30 @post = Post.new(post_params)
31
32 if @post.save
33 redirect_to action: :show, id: @post.id
34 else
35 render 'new'
36 end
37 end
38
39 def destroy
40 @post = Post.find(params[:id])
41 @post.destroy
42
43 redirect_to action: :index
44 end
This is my tag_controller
1 class TagsController < ApplicationController
2
3 def show
4 @tag = Tag.find(params[:id])
5 end~
my tag.rb
1 class Tag < ActiveRecord::Base
2 has_many :taggings
3 has_many :posts, through: :taggings
4
5 end
post.rb
1 class Post < ActiveRecord::Base
2
3 has_many :comments, dependent: :destroy
4 has_many :taggings
5 has_many :tags, through: :taggings
6 validates :title,
7 presence: true,
8 length: { minimum: 5 }
9
10 def tag_list
11 self.tags.collect do |tag|
12 tag.name
13 end.join(", ")
14 end
15 def tag_list=(tags_string)
16 tag_names = tags_string.split(",").collect{|s| s.strip.downcase}.uniq
17 new_or_found_tags = tag_names.collect { |name|
Tag.find_or_create_by(name: name) }
18 self.tags = new_or_found_tags
19 end
20 end~
and my posts_helper
1 module PostsHelper
2 def post_params
3 params.require(:post).permit(:title, :body, :tag_list)
4 end
5 end
Please let me know if I can add any more code that you would need to see
Please please help. I really need to get out of this little rut. And any
comments would be appreciated.
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