I am trying to make available to upload a multiple pictures with paperclip. I am following this tutorial: http://www.emersonlackey.com/article/paperclip-with-rails-3
Unfortunately I have error:
No handler found for "apple_mac-1280x800.jpg"
Asset.rb
class Asset < ActiveRecord::Base
belongs_to :post
has_attached_file :asset, :styles => { :small => "100x100", :original => '800x600>'}
end
Post.rb
class Post < ActiveRecord::Base
has_many :assets
accepts_nested_attributes_for :assets, :allow_destroy => true
end
Posts_controller.rb
def new
#post = Post.new
5.times { #post.assets.build }
respond_to do |format|
format.html # new.html.erb
format.json { render json: #post }
end
end
def edit
#post = Post.find(params[:id])
5.times { #post.assets.build }
end
#Post form
<% create_url = {:url=>{:action=>"create"}} if #post.new_record? %>
<% form_for #post, :html => {:multipart => true} do |t| %>
<p>
<%= t.label :title, 'Virsraksts:' %>
<%= t.text_field :title %>
</p>
<p>
<%= t.label :content, 'Teksts:' %>
<%= t.text_area :content, :class => "mceEditor"%>
</p>
<%= t.fields_for :assets do |asset_fields| %>
<% if asset_fields.object.new_record? %>
<p>
<%= asset_fields.file_field :asset %>
</p>
<% end %>
<% end %>
<%= t.submit %>
<% end %>
<%end%>
Problem solved by changing
<%= t.fields_for :assets do |asset_fields| %>
to
<%= f.fields_for :assets do |asset_fields| %>
But could someone explain why?
Related
I am trying to make a form for storing data hierarchy through the associations.
My structure of database is
meta
- ID (PK)
version
- meta_id (FK of meta)
- ID (PK)
- lang (FK from lang ...)
- ....
data
- ID (FK of version)
I need to store multiple language content under one ID.
Models are
class Meta < Sequel::Model(:link_meta)
one_to_many :version
end
class Version < Sequel::Model(:link_version)
one_to_one :meta, key: :meta_id
one_to_many :data, key: :id
one_to_one :lang, key: :lang
end
class Link < Sequel::Model(:link)
plugin :timestamps, :create => :created, :update => :updated
many_to_one :version, key: :id
end
And my form for creating input is.
<% form_for :links, url(:links, :create), :class => 'form-horizontal' do |f| %>
<%= partial 'links/form', :locals => { :f => f } %>
<% end %>
And this is my partial
<% f.fields_for :version, :class => 'form-horizontal' do |cz| %>
<%= cz.hidden_field :lang, :value => Lang.select(:id).where(:lang => "cz").map(:id) %>
<% cz.fields_for :data, :class => 'form-horizontal' do |link| %>
<% error = #links.errors.key?(:url) && #links.errors[:url].count > 0 %>
<fieldset class='control-group <%= error ? 'has-error' : ''%>'>
... form content
</fieldset>
<% end %>
<% f.fields_for :version, :class => 'form-horizontal' do |en| %>
<%= en.hidden_field :lang, :value => Lang.select(:id).where(:lang => "cz").map(:id) %>
<% en.fields_for :data, :class => 'form-horizontal' do |link| %>
<% error = #links.errors.key?(:url) && #links.errors[:url].count > 0 %>
<fieldset class='control-group <%= error ? 'has-error' : ''%>'>
... another form content
</fieldset>
<% end %>
<% end %>
But it fails on
undefined method `data' for [:class, "form-horizontal"]:Array
I tried different association combinations etc, I feel lost.
Thanks
Levi
While i was trying to submit the form, following error occured: Validation failed: Images imageable must exist and render the same new.html.erb view.
If i comment the file field in new.html.erb. Product is being created successfully.
ProductsController:
def new
#product = Product.new
end
def create
#product = Product.create!(product_params)
if #product.save
redirect_to products_path, notice: "Product Created Successfully"
else
render "new"
end
end
def product_params
params.require(:product).permit(:name, :quantity, :price, images_attributes: [:id, :photo, :_destroy])
end
new.html.erb:
<%= nested_form_for #product, html: { multipart: true } do |f|%>
<h2>New</h2>
<P> <%= f.label :name %> <%= f.text_field :name %> </P>
<P> <%= f.label :quantity %> <%= f.text_field :quantity %> </P>
<P> <%= f.label :price %> <%= f.text_field :price %> </P>
<%= f.fields_for :images do |p| %>
<p> <%= p.label :photo %> <%= p.file_field :photo %> </p>
<%= p.link_to_remove "Remove Image" %>
<% end %>
<%= f.link_to_add "Add Image", :images %>
<%= f.submit "Add Product" %>
<% end %>
20160725102038_add_image_columns_to_imageable.rb:
class AddImageColumnsToImageable < ActiveRecord::Migration[5.0]
def up
add_attachment :images, :photo
end
def down
remove_attachment :images, :photo
end
end
Model:product.rb
class Product < ApplicationRecord
has_one :variant
has_many :images, as: :imageable, dependent: :destroy
accepts_nested_attributes_for :images, allow_destroy: true
end
Model:image.rb
class Image < ApplicationRecord
belongs_to :imageable, polymorphic: true
has_attached_file :photo, styles: { medium: "300x300>", thumb: "100x100>" }, default_url: "/images/:style/missing.png"
validates_attachment :photo, content_type: { content_type: ["image/jpg", "image/jpeg", "image/png", "image/gif"] }
end
In rails 5, belongs_to makes sure that the associated model must exist.
E.g In this polymorphic association, Image model has belongs_to :imageable and Product model has has_many :images.
So here in new.html.erb we are creating an image, but respective product not exist, so that's why error Image imageable must exist .
Solution
Add optional: true while making an association of belong_to in Image model.
Image Model now looks like:
class Image < ApplicationRecord
belongs_to :imageable, polymorphic: true, optional: true
has_attached_file :photo, styles: { medium: "300x300>", thumb: "100x100>" }, default_url: "/images/:style/missing.png"
validates_attachment :photo, content_type: { content_type: ["image/jpg", "image/jpeg", "image/png", "image/gif"] }
end
Can anybody please help me to resolve the following error using rails version-3.2.19 ?When i am submitting values to database this error is coming.
Error
ActiveModel::MassAssignmentSecurity::Error in UsersController#create
Can't mass-assign protected attributes: con_password
My code snippets are as follows.
views/users/new.html.erb
<center>
<h1>Enter your data</h1>
<% if #user.errors.any? %>
<div id="error_explanation">
<h2><%= pluralize(#user.errors.count, "error") %> prohibited this post from being saved:</h2>
<ul>
<% #user.errors.full_messages.each do |message| %>
<li><%= message %></li>
<% end %>
</ul>
</div>
<% end %>
<div class="form-div">
<%= form_for :user,:url => {:action => 'create'} do |f|%>
<p>
<%= f.label :Name %>
<%= f.text_field :name,placeholder:"Enter your name" %>
</p>
<p>
<%= f.label :Email %>
<%= f.email_field :email,placeholder:"Enter your Email" %>
</p>
<p>
<%= f.label :Password %>
<%= f.password_field :password,placeholder:"Enter your password" %>
</p>
<p>
<%= f.label :password %>
<%= f.password_field :con_password,placeholder:"Enter your password again" %>
</p>
<p>
<%= f.label :content %>
<%= f.text_field :content,placeholder:"Enter your content" %>
</p>
<p>
<%= f.submit "Create User",:class => 'submit' %>
</p>
<% end %>
</div>
</center>
controller/users_controller.rb
class UsersController < ApplicationController
def index
end
def new
#user=User.new
end
def show
end
def create
#user=User.new(params[:user])
if #user.save
flash[:notice]="User has created successfully"
flash[:color]="valid"
redirect_to :action => 'index'
else
flash[:alert]="User could not create"
flash[:color]="invalid"
render :new
end
end
end
model/user.rb
class User < ActiveRecord::Base
attr_accessible :content, :email, :name, :password
EMAIL_REGEX = /\A[A-Z0-9._%+-]+#[A-Z0-9.-]+\.[A-Z]{2,4}\z/i
validates :name, :presence => true, :uniqueness => true, :length => { :in => 3..20 }
validates :email, :presence => true, :uniqueness => true, :format => EMAIL_REGEX
validates :password, :confirmation => true
validates_length_of :password, :in => 6..20, :on => :create
end
migrate\20150128062543_create_users.rb
class CreateUsers < ActiveRecord::Migration
def change
create_table :users do |t|
t.string :name
t.string :email
t.string :password
t.string :content
t.timestamps
end
end
end
Please help me to solve this issue.
Instead of <%= f.password_field :con_password,placeholder:"Enter your password again" %>, you should name your field password_confirmation, because this is what your model expects if it has validates :password, confirmation: true:
<%= f.password_field :password_confirmation, placeholder: "Enter your password again" %>
You also have to add password_confirmation to attr_accessible in the model.
i have a nested form model
<%= simple_form_for(#product, :html => { :multipart => true }) do |f| %>
<%= f.input :name %>
#... and some other
<%= f.simple_fields_for :productgroups do |builder| %>
<%= render 'form_productgroup', { :f => builder } %>
<% end %>
<% end %>
## partial-level-1: form_productgroup
<%= f.input :extrapercentage %>
#... and some other
<%= f.simple_fields_for :productmaterials do |builder| %>
<%= render 'form_productmaterial', { :f => builder } %>
<% end %>
## partial-level-2: form_productmaterial
<%= f.input :price %>
#... and some other
=> everything fine serverside, but i need to add records via ajax because each productgroup or productmaterial belongs to a specific type
now the question:
how to create a controller action which returns the new material form?
This code returns an error that f is not existing:
def new_productgroup
#product = Product.find(params[:id])
#productgroup = Productgroup.new(:product_id => #product.id, :materialgroup_id => params[:materialgroup_id])
render "form_productgroup", { :f => ???? }
end
please help me!
I use accepts_nested_attributes_for in a model but my child form isn't saved in the database?
I am building a nested form almost in the same way as in episode 196 / 197 from Ryan Bates railscasts. I have a parent question form and as a child the answer form:
models/question.rb
class Question < ActiveRecord::Base
belongs_to :user
has_many :answers, :dependent => :destroy
accepts_nested_attributes_for :answers, :reject_if => lambda { |a| a[:text].blank? },
:allow_destroy => true
validates :content, :presence => true
end
models/answer.rb
class Answer < ActiveRecord::Base
belongs_to :question
belongs_to :user
end
controllers/questions_controller.rb
class QuestionsController < ApplicationController
before_filter :authenticate_user!
def index
setup_questions
end
def create
#question = Question.new(params[:question])
#this is to get every id_key from the user into the params of the answer
params[:question][:answers_attributes].keys.each {|key| params[:question][:answers_attributes][key][:user_id] = current_user.id }
#question.user_id = current_user.id
if #question.save
redirect_to questions_path, :notice => "Successfully created question."
else
setup_questions
render :index
end
end
def edit
#question = Question.find(params[:id])
end
def update
#question = Question.find(params[:id])
respond_to do |format|
if #question.update_attributes(params[:question])
format.html { redirect_to(#question, :notice => 'Question was successfully updated.') }
format.xml { head :ok }
else
format.html { render :action => "edit" }
format.xml { render :xml => #question.errors, :status => :unprocessable_entity }
end
end
end
def show
#question = Question.find(params[:id])
end
def destroy
#question = Question.find(params[:id])
#authorize! :destroy, #question
#question.destroy
redirect_to questions_path, :notice => "Successfully deleted question: #{#question.content}."
end
private
def setup_questions
#questions = Question.all
#question ||= Question.new
#question.answers.build #to build the answers form
end
end
views/question/_form.html.erb
<%= form_for(#question) do |f| %>
<!-- =================== -->
<!-- = Error handeling = -->
<% if #question.errors.any? %>
<div id="error_explanation">
<h2><%= pluralize(#question.errors.count, "error") %> prohibited this question from being saved:</h2>
<ul>
<% #question.errors.full_messages.each do |msg| %>
<li><%= msg %></li>
<% end %>
</ul>
</div>
<% end %>
<!-- =================== -->
<!-- ================= -->
<!-- = Question form = -->
<div class="field">
<%= f.label :content, "Question" %><br />
<%= f.text_field :content, :placeholder => "type your question here.." %>
</div>
<!-- ====================== -->
<!-- = Nested Answer form = -->
<div class="answer-field">
<%= f.fields_for :answers do |builder| %>
<%= builder.label :content, "Possible answer" %><br />
<%= builder.text_field :content, :placeholder => "type an optional answer.." %>
<% end %>
</div>
<!-- ====================== -->
<div class="actions">
<%= f.submit %>
</div>
<!-- ================= -->
<% end %>
So now the big question... Why doesn't it save anything from the answer field to the database? I thought one create action at the parent (question) should be enough and that the "accepts_nested_attributes_for" should take care of it's child(s).
Regards,
Thijs
1 Remove this line from controller
params[:question][:answers_attributes].keys.each {|key| params[:question][:answers_attributes][key][:user_id] = current_user.id }
2 add this into your view
<!-- = Nested Answer form = -->
<div class="answer-field">
<%= f.fields_for :answers do |builder| %>
<% builder.object.user = current_user %>
<%= builder.label :content, "Possible answer" %><br />
<%= builder.text_field :content, :placeholder => "type an optional answer.." %>
<%= builder.hidden_field, :user_id %>
<% end %>
</div>
<!-- ====================== -->