I'm using activeadmin and for whatever reason it's not like my Tag model. I don't see anything out of the ordinary about it? google hasnt proved helpful
application_controller
class ApplicationController < ActionController::Base
protect_from_forgery
before_filter :get_tags
private
def get_tags
#tags = Tag.all
end
end
tags_controller
class TagsController < ApplicationController
def search
#tags = Tag.where("name like ?", "%#{params[:q]}%")
respond_to do |format|
format.json { render :json => #tags.to_json(:only => [:id, :name]) }
end
end
def show
#tag = Tag.find(params[:id])
#title = #tag.name
end
end
tag model
class Tag < ActiveRecord::Base
self.include_root_in_json = false
has_many :resource_tags
has_many :resources, :through => :resource_tags
attr_accessible :name
validates :name, :presence => true,
:length => { :within => 2..20 },
:uniqueness => { :case_sensitive => false }
end
full trace: http://pastie.org/3641717
I'm going to go out on a limb and guess that your Tag model is conflicting with ActiveAdmins
Arbre::HTML::Tag class. There may be other/better solutions, but one thing that's worked for me in the past is to use the as: option in ActiveAdmin.
ActiveAdmin.register Tag, as: 'AwesomeTag' do
Obviously, the change in copy might be ideal, but it's a good troubleshooting step. Another option is to rename your Tag model, or try namespacing it.
Related
can somebody help with this, please?
My blog post share isn't showing an image on Twitter. I benchmarked other websites and noticed all the blog post working websites had a domain URL in the prior to the image URL. So, I added on it and blog post started working!!!. Yayy
Then, I've encountered another problem. When I click to see a blog page, it shows an error message(per below)
ActionView::Template::Error (no implicit conversion of nil into String):
21: %meta{:content => "https://www.joynus.com"+#post.preview_image.try(:data).try(:url), :name => "twitter:image"}
My post controller
class PostsController < ApplicationController
before_filter :authorize, only: [:edit, :update, :new, :create, :destroy]
before_filter :find_post, only: [:show, :edit, :update, :destroy]
def index
#posts = Post.order("created_at DESC").page(params[:page]).per(9)
respond_to do |format|
format.html
format.rss { render :layout =>false }
end
end
def show
end
def new
#post = Post.new
end
def create
#post = Post.new(post_params)
if #post.save
redirect_to posts_url
else
render 'new'
end
end
def edit
end
def update
if #post.update_attributes(post_params)
redirect_to post_url(#post), notice: "#{#post.title} Updated"
else
render 'edit'
end
end
def destroy
#post.destroy
redirect_to posts_url, notice: "#{#post.title} Deleted"
end
private
def post_params
params.require(:post).permit(:title, :social_title, :contents, :author_id, :approved, :summary, :preview_image_id, :category)
end
def find_post
#post = Post.friendly.find(params[:id])
# If an old id or a numeric id was used to find the record, then
# the request path will not match the post_path, and we should do
# a 301 redirect that uses the current friendly id.
if params[:action] == 'show' && request.path != post_path(#post)
return redirect_to #post, :status => :moved_permanently
end
end
end
And, my post.rb
class Post < ActiveRecord::Base
extend FriendlyId
friendly_id :slug_candidates, use: [:slugged, :history]
belongs_to :preview_image, class_name: 'Ckeditor::Picture'
belongs_to :author, class_name: 'User'
## Validations
validates :contents, presence: true
validates :title, presence: true
validates :social_title, presence: true
validates :summary, presence: true, length: 1..300
validates :author, presence: false
validates :category, presence: true
delegate :full_name, to: :author, prefix: true, allow_nil: false
## Instance Methods
def slug_candidates
[
:slug_title,
[:id, :slug_title]
]
end
def slug_title
title&.downcase
end
def should_generate_new_friendly_id?
title_changed?
end
def raw_post
self.contents.html_safe
end
def preview_image_thumb(dimensions = '100x')
preview_image.try(:data).try(:thumb, dimensions).try(:url)
end
def self.preview_image_dimensions
'350x'
end
end
Is there a way to skip this error message? I did some research and found begin/rescue. But I don't know how and where to put it.
It would really appreciate any help or advice.
This is because you are using + to implicitly concatenate the URL to your host, but at least for one post, #post.preview_image.try(:data).try(:url) is returning as nil.
You could fix it by using string interpolation like this:
%meta{:content => "https://www.joynus.com#{#post.preview_image.try(:data).try(:url)}", :name => "twitter:image"}
Or by explicitly converting to string with to_s like this:
%meta{:content => "https://www.joynus.com"+#post.preview_image.try(:data).try(:url).to_s, :name => "twitter:image"}
I have two rails controller actions:
def show
#project = Project.find(params[:id])
render json: #project,
:only => [:id, :compilation_id],
:methods => :track_name,
:include => {
:user => { :only => [:id, :email] }
}
end
def list_users
render json: User.select(:id, :email)
end
I would like to render them both in one response. What is the best way to go about doing this? I tried using the to_json method as described here but I read that that method is deprecated and I also noticed that it escapes the content which seems to be unnecessary. Any help is appreciated.
For the cases where you need json structures complicated enough for to_json to look readable, I recommend to use active_model_serializers gem.
You can then define two serializer classes like this:
class ProjectSerializer < ActiveModel::Serializer
attributes :id, :compilation_id
has_many :users
end
class UserSerializer < ActiveModel::Serializer
attributes :id, :email
end
And then in your controller:
class ProjectsController < ApplicationController
def show
#project = Project.find(params[:id])
render json: #project, serializer: ProjectSerializer, status: 200
end
end
As a bonus track, you can even cache the response!
The solution, of course, was pretty simple:
project = Project.select(:id, :compilation_id, :user_id, :genre_id, :ordering).find(params[:id])
render json: { :project => project,
:users => User.select(:id, :email),
:genres => Genre.select(:id, :name),
:track_name => project.track_name
}
I'm working on a project where there are tasks that make up a scavenger hunt. When a user creates a new hunt, I'd like the hunts/show.html.erb file to show the hunt as well as the tasks associated with that hunt. But the models are giving me trouble. I've got the hunt model setup to that it accepts nested attributes for the tasks model. So when the user creates a new hunt, she also creates three tasks automatically. I can get the new hunt to save, but I can't get those new tasks to save. Here are my models.
What's missing? Do I need an "attr accessible" statement in the HunTasks.rb file?
class Hunt < ActiveRecord::Base
has_many :hunt_tasks
has_many :tasks, :through => :hunt_tasks
accepts_nested_attributes_for :tasks, :reject_if => lambda { |a| a[:content].blank? }, :allow_destroy => true
attr_accessible :name
validates :name, :presence => true,
:length => { :maximum => 50 } ,
:uniqueness => { :case_sensitive => false }
end
class Task < ActiveRecord::Base
has_many :hunt_tasks
has_many :hunts, :through => :hunt_tasks
attr_accessible :name
validates :name, :presence => true,
:length => { :maximum => 50 } ,
:uniqueness => { :case_sensitive => false }
end
class HuntTask < ActiveRecord::Base
belongs_to :hunt # the id for the association is in this table
belongs_to :task
end
Here's what my Hunt controller looks like:
class HuntsController < ApplicationController
def index
#title = "All Hunts"
#hunts = Hunt.paginate(:page => params[:page])
end
def show
#hunt = Hunt.find(params[:id])
#title = #hunt.name
#tasks = #hunt.tasks.paginate(:page => params[:page])
end
def new
if current_user?(nil) then
redirect_to signin_path
else
#hunt = Hunt.new
#title = "New Hunt"
3.times do
hunt = #hunt.tasks.build
end
end
end
def create
#hunt = Hunt.new(params[:hunt])
if #hunt.save
flash[:success] = "Hunt created!"
redirect_to hunts_path
else
#title = "New Hunt"
render 'new'
end
end
....
end
The major difference between your example and the railscast is that you are doing many-to-many instead of one to many (I think his was Survey had many Questions). Based on what you described, I wonder if the HuntTask model is necessary. Are the tasks for one hunt ever going to be resused in another hunt? Assuming they are, then looks like your answer is here:
Rails nested form with has_many :through, how to edit attributes of join model?
You'll have to modify your new action in the controller to do this:
hunt = #hunt.hunt_tasks.build.build_task
Then, you'll need to change your Hunt model to include:
accepts_nested_attributes_for :hunt_tasks
And modify your HuntTask model to include:
accepts_nested_attribues_for :hunt
I have the following classes:
class VideoChannel < ActiveRecord::Base
#Associations
belongs_to :video_playlist, :dependent => :destroy
VideoChannel.video_playlist_name
delegate :name, :id, :list_type, :list_id, :manual, :to => :video_playlist, :prefix => true
#validations
validates_presence_of :name
#After Functions
def after_create
video_playlist = VideoPlaylist.new(:name => self.name,
:list_type => "VideoChannel",
:list_id => self.id)
video_playlist.save
end
And :
class VideoPlaylist < ActiveRecord::Base
belongs_to :list, :polymorphic => true
has_many :video_channels, :dependent => :destroy
delegate :name, :id, :description, :to => :video_channel, :prefix => true
end
I'm trying to use the Rails Delegate function to create a link in the VideoChannel page that allows me to to link to the Video Playlist and edit the contents there. So the association is there and You can currently edit the playlists by going through the playlists section but we want to combine them. I can't seem to figure this out. Im also very new to Rails, still working through the guides etc.
Edit: Here's the view code
<%= link_to '<span class="pen icon"></span>Edit',
content_url(:controller =>"video_playlists", :id => channel.video_playlist_id, :action => "edit"),
:class => "button right" %>
Here are teh relevant pieces of the controllers:
class VideoChannelsController < ApplicationController
# GET /videochannels
# GET /videochannels.xml
def index
#video_channels = VideoChannel.roots(:order => 'order_num')
#video_channels_parents = #video_channels.group_by {:parent_id}
respond_to do |format|
format.html # index.html.erb
format.xml { render :xml => #video_channels }
end
end
# GET /videochannels/1
# GET /videochannels/1.xml
def show
#video_channel = VideoChannel.find(params[:id], :order => 'order_num')
respond_to do |format|
format.html # show.html.erb
format.xml { render :xml => #video_channel }
end
end
end
class VideoPlaylistsController < ApplicationController
# GET /video_playlists
# GET /video_playlists.xml
def index
if !params[:with].nil?
#video_playlists = VideoPlaylist.find(:all, :conditions => {:list_type => 'VideoShow'})
else
#video_playlists = VideoPlaylist.find(:all, :conditions => {:list_type => 'Section'})
end
respond_to do |format|
format.html # index.html.erb
format.xml { render :xml => #video_playlists }
end
end
# GET /video_playlists/1
# GET /video_playlists/1.xml
def show
#video_playlist = VideoPlaylist.find(params[:id], :include => [{:video_video_playlists => :video}, {:videos => :asset}, {:videos => :content_image}])
respond_to do |format|
format.html # show.html.erb
format.xml { render :xml => #video_playlist }
end
end
end
Where did the line
VideoChannel.video_playlist_name
Come from? What's it doing? You're also calling a method on the class not an instance (sort of - Ruby isn't quite like this, but it's enough to explain).
Anyway:
Delegate is really for avoiding lots of train wreck code like this:
fred.jim.bill.xxx
You've said that they belong to each other - the relationships look like they're the wrong way round. Why are you creating the parent from inside the child? How are you going to have many video channels belonging to a given playlist?
I think you need to look at build and the relationship names. To gat past me maybe misunderstanding your model, lets have switch to a product that has many stock items:
class Product < ActiveRecord::Base
has_many :stock_items
end
class StockItem < ActiveRecord::Base
belongs_to :product
end
This means that stock_item will have a column product_id.
So, say you're creating a product you'd do something like:
product.stock_items.build # :whatever the params are required
This automatically sets the id's for you and means you don't have to set id's. Then when you do product.save it will save all the related stock items too.
And in the view for this toy model, then if you were displaying one of the stock items, you'd use delegate to show the name of the product in the view without having to do lost of stock_item.product.name (for example).
I hope this helps.
We know that the distance field gets dropped when using the Geokit gem in Rails with acts_as_mappable :through model class. I wonder if there's a way to work around this to get the distance field back. I tried to follow the monkey-patching example over here:
http://www.sobyteme.com/news/2010/05/13/computers/2010/06/25/geokit-acts_as_mappable-through-with-distance-attribute/
but it didn't work for me.
Well, Steve's suggestion over on his site was accurate, I was missing calling sort_by_distance_from after doing the find. So credit goes to him for this answer.
I'm on Rails v3.0.7. Here's my code:
class Office < ActiveRecord::Base
has_many :users
acts_as_mappable :default_units => :miles,
:default_formula => :sphere,
:lat_column_name => :latitude,
:lng_column_name => :longitude
end
class User < ActiveRecord::Base
belongs_to :office
acts_as_mappable :through => :office
end
users_controller.rb:
# Monkey patching to include the 'distance' attribute
module Geokit
module Mappable
def to_lat_lng
return self if instance_of?(Geokit::LatLng) || instance_of?(Geokit::GeoLoc)
return LatLng.new(self.office.send(self.office.class.lat_column_name),
self.office.send(self.office.class.lng_column_name)) if self.class.respond_to?(:acts_as_mappable)
nil
end
end
end
class UsersController < ApplicationController
def location
#lat = params[:lat].to_f
#long = params[:long].to_f
#origin = [#lat, #long]
#users = User.find(:all,
:origin => #origin,
:conditions => "distance < 3")
# We have to add this to get the 'distance' field
#users.sort_by_distance_from(#origin)
respond_to do |format|
format.html
format.xml { render :xml => #users.to_xml(:methods => :distance)}
format.json { render :json => #users.to_json(:methods => :distance)}
end
end
...
end