I have a table for storing links. I'm trying to use the pismo gem for grabbing meta data from a url, and saving that to the table.
In my link controller I have a before filter :
def pismo_grab_meta_data
doc = Pismo::Document.new("http://google.com/")
#link_title = doc.title
end
Which gets called in the new and create action. In my view I pass the instance variable in a hidden field.
<%= f.hidden_field :name, :value => #link_title %>
This works when hard code the url as a string (like the above google example), but fails when I pass it the url params, like so:
doc = Pismo::Document.new(params[:url])
Error: undefined method `gsub!' for nil:NilClass
Pretty new to rails, so I assume I'm doing something stupid here. Any help is very welcome!
<%= form_for(#link, :html => { "data-behavior" => "submit-form"}) do |f| %>
<% if #link.errors.any? %>
<div id="error_explanation">
<h2><%= pluralize(#link.errors.count, "error") %>
prohibited this link from being saved:
</h2>
<ul>
<% #link.errors.full_messages.each do |msg| %>
<li><%= msg %></li>
<% end %>
</ul>
</div>
<% end %>
<%= f.hidden_field :name, :value => #link_title %>
<div class="field urlsaver">
<%= f.label :url %><br />
<% if params[:link].present? %>
<%= f.text_field :url, :value => params[:link] %>
<% else %>
<%= f.text_field :url %>
<% end %>
</div>
<div class="actions">
<%= f.submit 'Save', :class => 'btn' %>
</div>
<% end %>
The value you are looking for should be in params[:link][:url].
Change the line to :
doc = Pismo::Document.new(params[:link][:url])
Related
i'm new to rails and ruby, sorry if it's too noobish to ask but need help cause i'm stuck.
i have simple 'app', using rails forms. I need to change ( . ) into ( : ) whenever user will fill the text_field on form.
can anyone be so kind and help me create method from scratch, to access text_field : appearance and use gsub method on it to change ( . ) into ( : ) ?
here is my view: (model is empty, controller is generated using scaffold, super simple stuff)
<%= form_for(#sample) do |f| %>
<% if #sample.errors.any? %>
<div id="error_explanation">
<h2><%= pluralize(#sample.errors.count, "error") %> prohibited this sample from being saved:</h2>
<ul>
<% #sample.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 :url %><br>
<%= f.text_field :url %>
</div>
<div class="field">
<%= f.label :appearance %><br>
<%= f.text_field :appearance %>
</div>
<div class="actions">
<%= f.submit %>
</div>
<% end %>
In your model, try this:
class Sample < ActiveRecord::Base
def appearance=(value)
write_attribute(:appearance, value.gsub(/\./, ':'))
end
end
I'm playing around with Form Helpers. I found some code from another SO question and thought it was pretty efficient at creating radio buttons with an elegant loop. Now that I've incorporated it, it doesn't save the data (e.g. the category value is not being saved to the project table)
Please see code below of _form.html.erb
<%= form_for(#project) do |f| %>
<% if #project.errors.any? %>
<div id="error_explanation">
<h2><%= pluralize(#project.errors.count, "error") %> prohibited this project from being saved:</h2>
<ul>
<% #project.errors.full_messages.each do |message| %>
<li><%= message %></li>
<% end %>
</ul>
</div>
<% end %>
<div class="field">
<%= f.label :title %><br>
<%= f.text_field :title %>
</div>
<div class="form_row">
<label for="category">Category:</label>
<% [ 'checklist', 'process'].each do |category| %>
<br><%= radio_button_tag 'category', category, #category == category %>
<%= category.humanize %>
<% end %>
<br>
</div>
<div class="field">
<%= f.label :description %><br>
<%= f.text_field :description %>
</div>
<div class="actions">
<%= f.submit %>
</div>
<% end %>
Your radio button parameter is being created outside of the project structure. If you look at params, you'll probably see
{:category => "your_category", :project => {...project params...}}
It is because you're using the radio_button_tag instead of the regular form helper. Try this instead:
f.radio_button :category, category, :checked => (#category == category)
Also, as Justin said, make sure :category is included in the project_params in your controller.
I have a form as follows:
<%= form_for(#car, :html => {:class => 'form-horizontal' }) do |f| %>
<% if #car.errors.any? %>
<div id="error_explanation">
<h2><%= pluralize(#car.errors.count, "error") %> prohibited this car from being saved</h2>
<ul>
<% #car.errors.full_messages.each do |msg| %>
<li><%= msg %></li>
<% end %>
</ul>
</div>
<% end %>
<div class="field">
<%= f.label :price %><br />
<%= f.text_field :price %>
</div>
<div class="field">
<%= f.label :model_year %><br />
<% %>
<% end %>
</div>
I want to have a collection select for the model year starting 100 years back and going to a year in the future. I have tried
<%= f.select_year :model_year%>
but it says that select_year is not a valid method. Tried
<%= f.date :model_year, :discard_month => true %>
also to no avail. Any thoughts?
select_year is a helper that generates a full select tag with options. Since you're using form_for instead of form_tag, you'll want to use a helper that can be called on a form builder object.
<%= f.select :model_year, (Time.zone.now.year - 100)..(Time.zone.now.year + 1) %>
Reference: http://api.rubyonrails.org/classes/ActionView/Helpers/DateHelper.html#method-i-select_year
I have a view where I need to show a list of pages (I have a model called Page) and then i need the id of the selected page
I have this code in the view
مهمة جديدة
: <%= form_for :task, :url => {:action=>"create", :controller=>"tasks"}, :html => {:class :
=> "nifty_form"} do |f| %>
<% if #task.errors.any? %>
<div id="error_explanation">
<h2>: عذرا لم نستطع استكمال طلبك</h2>
<ul>
<% #task.errors.full_messages.each do |msg| %>
<li style="color:red;"><%= msg %></li>
<% end %>
</ul>
</div>
<% end %>
<div class="field">
<%= f.label "اسم المهمة" %><br />
<%= f.text_field :name %>
</div>
<div class="field">
<%= f.label "وصف المهمة" %><br />
<%= f.text_area :description %>
</div>
<div class="actions">
<button><%= link_to 'العودة الى قائمة المهام', project_tasks_path %></button>
<%= f.submit "مهمة جديدة"%>
</div>
<%= select_tag(:page, options_for_select(['a',1])) %>
<% end %>
#pageslist is a 2d array of the form [['pagename', 1], ..]
The question is how can i access the page_id of the selected page in the controller ?
I tried params[:p_id] but it is not working any help please?
This is what I have in the controller:
#task = Project.find(params[:project_id]).tasks.new(params[:task])
#task.update_attributes({:page_id => params[:p_id]})
Assuming that #pagelist is in a format as you described, then in your view:
<%= select_tag(:page, options_for_select( #pagelist )) %>
You had missed it in your example, and provided only 1d array for options_for_select.
With such prepared view your create action will receive page id in:
params[:page]
it's because you had passed :page as a first argument for select_tag.
I have a model called posts, and it has many attachments.
The attachments model is using paperclip.
I made a standalone model for creating attachments which works just fine, this is the view as instructed here (https://github.com/thoughtbot/paperclip):
<% form_for :attachment, #attachment, :url => #attachment, :html => { :multipart => true } do |form| %>
<%= form.file_field :pclip %>
<%= form.submit %>
<% end %>
The nested form in posts looks like this:
<% #attachment = #posts.attachments.build %>
<%= form_for(#posts) do |f| %>
<% if #posts.errors.any? %>
<div id="error_explanation">
<h2><%= pluralize(#posts.errors.count, "error") %> prohibited this post from being saved:</h2>
<ul>
<% #posts.errors.full_messages.each do |msg| %>
<li><%= msg %></li>
<% end %>
</ul>
</div>
<% end %>
<div class="field">
<%= f.label :name %><br />
<%= f.text_field :name %>
</div>
<div class="field">
<%= f.label :description %><br />
<%= f.text_area :description %>
</div>
<div class="field">
<%= f.fields_for :attachments, #attachment, :url => #attachment, :html => { :multipart => true } do |at_form| %>
<%= at_form.file_field :pclip %>
<% end %>
</div>
<div class="actions">
<%= f.submit %>
</div>
<% end %>
An attachment record is created, but its empty. The file is not uploaded. The post meanwhile, is successfully created...
Any ideas?
You are missing the :multipart option in your form definition:
<% #attachment = #post.attachments.build %>
<%= form_for #post, :html => { :multipart => true } 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 |msg| %>
<li><%= msg %></li>
<% end %>
</ul>
</div>
<% end %>
<div class="field">
<%= f.label :name %><br />
<%= f.text_field :name %>
</div>
<div class="field">
<%= f.label :description %><br />
<%= f.text_area :description %>
</div>
<div class="field">
<%= f.fields_for :attachments, #attachment do |at_form| %>
<%= at_form.file_field :pclip %>
<% end %>
</div>
<div class="actions">
<%= f.submit %>
</div>
<% end %>
Also, your #posts variable should really be #post (single ActiveRecord instance as opposed to an array of ActiveRecord instances).