I have a pair of radio buttons that I want to pre-assign a checked value to only my new action. Right now I'm conditionally rendering two partials. One partial that has radio buttons with checked attributes and the other with not attributes at all:
<%= form_for([#restaurant, #dish_review], url: :restaurant_dish_reviews) do |f| %>
<% if action_name == "new" %>
<%= render "status_buttons_checked", f: f, dish: #dish %>
<% else %>
<%= render "status_buttons", f: f %>
<% end %>
<% end %>
_status_buttons_checked
<div class="field">
<%= f.radio_button :status, :upvoted, checked: current_user.voted_up_on?(dish) %>
<%= f.label :status, value: :upvoted %>
<%= f.radio_button :status, :downvoted, checked: current_user.voted_down_on?(dish) %>
<%= f.label :status, value: :downvoted %>
</div>
_statsus_buttons
<div class="field">
<%= f.radio_button :status, :upvoted, checked: current_user.voted_up_on?(dish) %>
<%= f.label :status, value: :upvoted %>
<%= f.radio_button :status, :downvoted, checked: current_user.voted_down_on?(dish) %>
<%= f.label :status, value: :downvoted %>
</div>
I was wondering if there was any way in Rails where I can insert the conditional in the radio_button parameter instead of creating two partials. I'd like to something similar to what's show below but run into a template error:
<%= f.radio_button :status, :downvoted, if action_name == "new" current_user.voted_down_on?(dish) %>
When using form_for, the form methods you use are automatically populated with the appropriate data for your attributes. Whilst I don't know if this works with the checked value, it means that if you have the following:
<%= form_for #user do |f| %>
<%= f.text_field :name %>
<% end %>
... :name will be populated from your #user object (if it's new, no data will be inserted).
--
This means that if you're using form_for, you should be able to populate the checked value with the data passed to the view:
<%= form_for [#restaurant, #dish_review] do |f| %>
<%= f.radio_button :status, :upvoted, checked: current_user.voted_up_on? #dish %>
<%= f.radio_button :status, :downvoted, checked: current_user.voted_down_on? #dish %>
<% end %>
I don't see what you're trying to achieve from your partials (they're both the same) -- but if you wanted to create "checked" on conditions, you'd be able to use the following:
<%= checked = action_name == "new"
<%= f.radio_button :status, :downvoted, checked: checked %>
This will set the value as "true" or "false" depending on whether the action is new or not.
Related
I added a new column to model Plan, named :per_unit_quantities_configuration which is a hash with min, max and step key/values.
t.jsonb "per_unit_quantities_configuration", default: {}
When I edit a Plan, the hash is being correctly saved to the DB (I can access each key/value from the console), but the forms are not displaying any of its values (the fields are empty).
I tried adding a store_accessor for the column in the Plan model, but it is not working:
store_accessor :per_unit_quantities_configuration, :min, :max, :step
Example of a simple_form html that does not display hash values:
<%= simple_form_for [:admin, #base_plan, #plan] do |f| %>
<% if f.object.base_plan.per_unit? %>
<div class="d-flex">
<%= f.simple_fields_for :per_unit_quantities_configuration do |fields| %>
<% if f.object.errors[:per_unit_quantities_configuration].any? %>
<%= f.error :per_unit_quantities_configuration, id: "per_unit_price_error", class: "invalid-feedback", error_prefix: "gato" %>
<% end %>
<%= fields.input :min %>
<%= fields.input :max %>
<%= fields.input :step %>
<% end %>
</div>
<% end %>
<%= f.button :submit, class: "pull-right" %>
<% end %>
What am I doing wrong?
since you setup store_accessor :per_unit_quantities_configuration then you can access directly 3 attributes min, max, step, so that you no need to wrap those attributes on simple_fields_for :per_unit_quantities_configuration and treat them as normal fields (that mean on controller you have to permit them as normal fields)
# view
<%= f.input :min %>
<%= f.input :max %>
<%= f.input :step %>
# controller
def plan_params
params.require(:plan).permit(:min,:max,:step)
end
I am using a theme that has very specific layouts and I wanted to make a failsafe way to you rails forms.
I have a layout app/views/shared/forms/fields/_layout.html.erb
<div class="js-form-message mb-4">
<div class="js-focus-state input-group u-form">
<div class="input-group g-brd-primary--focus">
<%= yield(:field) %>
</div>
</div>
</div>
And I have two partials.
1-st partial: app/views/shared/forms/fields/_email.html.erb
<% form = locals[:form] %>
<% locals[:required] = locals[:required].nil? ? true : locals[:required] %>
<% locals[:placeholder] = locals[:placeholder] || t('forms.shared.email.placeholder') %>
<%= render layout: "shared/forms/fields/layout", locals: locals do %>
<% content_for(:field) do %>
<%= form.email_field :email,
placeholder: locals[:placeholder],
class: "form-control g-py-15 g-px-15",
"data-error-class"=>"u-has-error-v1-3",
"data-success-class"=>"u-has-success-v1-2",
"data-msg-email" => t('forms.shared.email.validate'),
"data-msg" => t('forms.shared.required'),
autofocus: locals[:autofocus],
required: locals[:required] %>
<% end %>
<% end %>
2-nd partial: app/views/shared/forms/fields/_login.html.erb
<% form = locals[:form] %>
<% locals[:required] = locals[:required].nil? ? true : locals[:required] %>
<% locals[:placeholder] = locals[:placeholder] || t('forms.shared.login.placeholder') %>
<%= render layout: "shared/forms/fields/layout", locals: locals do %>
<% content_for(:field) do %>
<%= form.email_field :login,
placeholder: locals[:placeholder],
class: "form-control g-py-15 g-px-15",
"data-error-class"=>"u-has-error-v1-3",
"data-success-class"=>"u-has-success-v1-2",
"data-msg" => t('forms.shared.required'),
autofocus: locals[:autofocus],
required: locals[:required] %>
<% end %>
<% end %>
And when I do this:
<%= render "shared/forms/fields/email", locals: {form: f} %>
<%= render "shared/forms/fields/login", locals: {form: f} %>
I get
Email Field
Email Field/Login Field
I found out that content_for 'appends' the block that you give it and then when I yield the whole block is returned.
The first time there is nothing in content_for(:field) and it appends to it Email Field. But the second time it does not clear its content and just appends Login Field to it.
I am thinking of adding additional complexity to layout.html.erb so just keeping it inline isn't an option.
Is there a way to tell to the layout only to yield the 'newest' value of content_for.
EDIT:
I wrote a method to flush after an yield, suggesting that the same key would be used again:
def yield_and_flush!(content_key)
view_flow.content.delete(content_key)
end
content_for has flush option to reset previous content:
<% content_for :field, flush: true do %>
new content here
<% end %>
The solution was this to write an yield_and_flush! method. I saw the solution here
def yield_and_flush!(content_key)
view_flow.content.delete(content_key)
end
I have a Post model and Tag model with many to many relationships.
Post Model:
class Post < ActiveRecord::Base
has_and_belongs_to_many :tags
end
Tag model:
class Tag < ActiveRecord::Base
has_and_belongs_to_many :posts
end
I also have a join table for posts_tags :
class JoinPostsAndTags < ActiveRecord::Migration
def change
create_table :posts_tags do |t|
t.integer :tag_id
t.integer :post_id
t.timestamps null: false
end
end
end
Now, I need to provide multiple selection for selecting tags for a post.
Below is the post form.html.erb
<%= form_for #post do |f| %>
<% if #post.errors.any? %>
<div id="error_explanation">
<h2><%= pluralize(#post.errors.count, "error") %> prohibited this post from being saved:</h2>
<ul>
<% #post.errors.full_messages.each do |message| %>
<li><%= message %></li>
<% end %>
</ul>
</div>
<% end %>
<div class="field">
<%= f.label :Name %><br>
<%= f.text_field :Name %>
</div>
<div class="field">
<%= f.label :Email %><br>
<%= f.text_field :Email %>
</div>
<div class="field">
<%= f.label :Message %><br>
<%= f.text_area :Message %>
</div>
<% #tags= Tag.all %>
<% if #tags %>
<% #tags.each do |tag| %>
<div>
<%= check_box_tag "post[tag_ids][]", tag.id, #post.tags.include?(tag) %>
<%= tag.name %>
</div>
<% end %>
<% end %>
<br><br>
<%= link_to 'Create Tag', tags_path %>
<br><br>
<div class="actions">
<%= f.submit %>
</div>
<% end %>
It is not adding the selected tags to the post. I need to add the selected tags to the post. How can I do it.
But, in rails console if I use post= Post.first tag= Tag.first post.tags<<tag it adds the tag to the post.
I don't have any special code in post controller to handle this. Please help me.
Add {tag_ids:[]} to your params permit arguments in your PostsController, like so:
def post_params
params.require(:post).permit(:name, :email, :message, {tag_ids:[]})
end
I am using rails 4 and have a subject and comment models. Subject is a one to many relationship with comments. I want a simple page that can add comments to many subjects on the same page. So in my form I know how to submit a comment to create but I dont know how to find the right subject in my controller to add it to. Any advice?
class CommentsController < ApplicationController
def create
comment = Comment.create(comment_params)
if comment.save
# The line below is incorrect, I dont know what to do
Subject.find(params[:subject_id]).comments << comment
redirect_to(:controller => 'static_pages', action: 'home')
end
end
def new
end
private
def comment_params
params.require(:comment).permit(:text, :user_name)
end
end
StaticPages#home Find me in
app/views/static_pages/home.html.erb
<% #subjects.each do |subject| %>
<div class="subjects <%= cycle('odd', 'even') %>">
<h1><%= subject.name %></h1>
<h3><%= subject.description %></h3>
<% subject.comments.each do |comment|%>
<div class="comment">
<h4><%= comment.user_name%></h4>
<%= comment.text %>
</div>
<% end %>
<%= form_for(#comment) do |f| %>
<%= f.label :user_name %>
<%= f.text_field :user_name %>
<%= f.label :text %>
<%= f.text_field :text %>
<%= f.submit('Create comment', subject_id: subject.id) %>
<% end %>
</div>
<% end %>
The simplest way would be to populate the subject_id attribute of your #comment form, like this:
<%= form_for(#comment) do |f| %>
<%= f.label :user_name %>
<%= f.text_field :user_name %>
<%= f.label :text %>
<%= f.text_field :text %>
<%= f.hidden_field :subject_id, value: subject.id %>
<%= f.submit('Create comment', subject_id: subject.id) %>
<% end %>
This will populate the subject_id attribute of your new Comment object, which will essentially associate it through Rails' backend:
#app/controllers/your_controller.rb
Class YourController < ApplicationController
def create
#comment = Comment.new comment_params
#comment.save
end
private
def comment_params
params.require(:comment).permit(:subject_id, :text, :user_name)
end
end
--
foreign_keys
This works because of the Rails / relational database foreign_keys structure
Every time you associate two objects with Rails, or another relational database system, you basically have a database column which links the two. This is called a foreign_key, and in your case, every Comment will have the subject_id foreign_key column, associating it with the relevant subject
So you may have many different forms using the same #comment variable - the trick is to populate the foreign_key for each one
I have a nested form.
Right now I want to arrange the layout with some CSS but I am facing trouble allocating dom ids to the form.
This is the subject controller.
I want to allocate lesson_type as seen in line 5 as the dom id.
1 def index
2 #subjects = Subject.all
3 #subject = Subject.new
4 lecture = #subject.lessons.build
5 lecture.lesson_type = "lecture"
lecture.lesson_groups.build
lecture.destroy
tutorial = #subject.lessons.build
tutorial.lesson_type = "tutorial"
tutorial.lesson_groups.build
tutorial.destroy
laboratory = #subject.lessons.build
laboratory.lesson_type = "laboratory"
laboratory.lesson_groups.build
laboratory.destroy
respond_to do |format|
format.html # index.html.erb
format.json { render json: #subjects }
format.js
end
end
The following is the form.
<%= nested_form_for(#subject, :remote=>true) do |f| %>
<% if #subject.errors.any? %>
<div id="error_explanation">
<h2><%= pluralize(#subject.errors.count, "error") %> prohibited this subject from being saved:</h2>
<ul>
<% #subject.errors.full_messages.each do |msg| %>
<li><%= msg %></li>
<% end %>
</ul>
</div>
<% end %>
<div class="field">
<%= f.label :subject_code %><br />
<%= f.text_field :subject_code %>
</div>
<%= f.fields_for :lessons do |lesson| %>
<%= lesson.label :lesson_type %><br/>
<%= lesson.text_field :lesson_type, :readonly=>true%><br/>
<%= lesson.label :name %><br/>
<%= lesson.text_field :name %><br/>
<%= lesson.fields_for :lesson_groups do |lesson_group| %>
<%= lesson_group.label :group_index %><br/>
<%= lesson_group.text_field :group_index %>
<%= lesson_group.link_to_remove "Remove this task" %>
<% end %>
This is the div where I want to add an id to.
<%= f.fields_for :lessons do |lesson| %>
<%= lesson.label :lesson_type %><br/>
<%= lesson.text_field :lesson_type, :readonly=>true%><br/>
<%= lesson.label :name %><br/>
<%= lesson.text_field :name %><br/>
I have tried out the following but it did not worked.
<div id = "<%= :lesson_type%>">
Would appreciate it if someone could help me out thanks.
sorry..
#controller
def index
...
lecture.lesson_type = #lesson_dom_id = "lecture" # line 5
...
end
#view
<div id="<%= #lesson_dom_id %>">