(I'm just learning rails so....)
I have a photo model and a gallery model, habtm associations and a join table. I'm making a photo gallery. The gallery page has a title field and description field. User creates gallery title, then goes to the photo page and checkboxes each image they want in that gallery.
I get the error "undefined method `to_i' for ["1", {"title"=>"1"}]:Array" when trying to save/update a photo with a gallery title(with the checkbox)
<% form_for #photo, :html => {:multipart => true } do |f| %>
<%= f.error_messages %>
<p>
<%= f.label :title %>
<%= f.text_field :title %>
</p>
<p>
<%= f.label :description %>
<%= f.text_area :description %>
</p>
<p>
<%= f.label :image %>
<%= f.file_field :image %>
</p>
<% for gallery in #photo.galleries %>
<% fields_for "painting[gallery_attributes][]", gallery do |g| %>
<div>
<%= g.check_box :title %>
<%= gallery.title %>
</div>
<% end %>
<% end %>
<p><%= submit_tag 'Update' %></p>
<% end %>
How much of this is horribly wrong?
Can someone point me in the right direction?, I can't find any tutorials relating to this for 2.3 and above.
For this complicated task of having multiple models updated with a single form, i would recommend the three part series in railscasts:
http://railscasts.com/episodes/73-complex-forms-part-1
http://railscasts.com/episodes/74-complex-forms-part-2
http://railscasts.com/episodes/74-complex-forms-part-3
Though please if another forum member knows of a better/more up-to-date tutorial let me know, i did this back in the day and it was a pain.
I thought this was a good example of nested forms http://github.com/alloy/complex-form-examples/
Related
I have set everything up for active storage and when I add a trip with an image, the app redirects to that trips show page and I can see the image. When I lave and go back to that show page I get the error
`Can't resolve image into URL: undefined method `persisted?' for nil:NilClass`
Here is the show page for trip
<h1> Location: <%= #trip.location %> </h1>
<h2> Date Visited: <%= #trip.date %> </h2>
<%= image_tag #trip.cover_photo, :style => "max-height:300px"%>
<h2> More Photos </h2>
<%= link_to "Add a photo", new_photo_path(#trip) %> <br>
<%= link_to "Public Profile", trips_path(#user) %> <br>
Here is the new trip form
<h1>Add a new trip </h1>
<%= form_for #trip do |f| %>
<%= f.label :location %>
<%= f.text_field :location %> <br>
<%= f.label :date %>
<%= f.text_field :date %> <br>
<%= f.label :cover_photo %>
<%= f.file_field :cover_photo %> <br>
<%= f.hidden_field :user_id, :value => session[:user_id] %>
<%= f.submit "Submit" %>
<% end %>
I'm not able to see the error since the photo uploads and displays correctly at first.
Had the same issue, except that I wasn't able to display the images even once. In your case, seems that the first time you are watching a temporal image, which is deleted after you live that view.
I realize that I was forgetting to add the attachment to permitted parameters in my controller, so the image wasn't saving. Your params should look like this:
def trip_params
params.require(:trip).permit(:location, :date, :cover_photo, :user_id)
end
I have following two resources:
Position
JobTitle
And a position belongs_to job title.
In page Position, I create new position, with job_title select and some other selects. I need also create new job_title in this page, instead of choose select variants. So, in fact, or I choose job title in existing base, or create new, and save it for this position.
How can I make this? I looking for answer, and reading docs, but nothing!
You need to use fields_for in your view to send params for two models at a time.
Here's how I would try to solve to problem:
<%= form_for #job_title do |f| %>
<%= f.error_messages %>
<p>
<%= f.label :name %><br />
<%= f.text_field :name %>
</p>
<p>
<%= f.label :description %><br />
<%= f.text_field :description %>
</p>
<%= f.fields_for :position do |builder| %>
<p>
<%= builder.label :name %> <br />
<%= builder.text_field :name %>
</p>
<% end %>
<p><%= f.submit "Submit" %></p>
<% end %>
And then, in your controller, you need to create the association. For more information, you can check out the railscast for nested forms.
So I'm building a nested form with an Campaigns model and a Sites model where Campaigns has_many Sites. In my Campaigns form I have:
<%= f.fields_for :sites do |builder| %>
<%= render "site_fields", :f => builder %>
<% end %>
And then in the _site_fields.html.erb I have:
<div class="field">
<%= f.label :title %><br />
<%= f.text_field :title %>
</div>
<%= f.label "Image"%><br>
<%= f.file_field :image %>
<div class="field">
<%= f.label :url %><br>
<%= f.text_field :url %>
</div>
This all seems to work (shockingly) but I would like to have a preview of the image already uploaded for a particular site in the form. So where I have f.file_field :image I would also like to be able to show a preview of that image. The problem is that I don't seem to be able to access the current site being rendered because I'm using f.fields_for.
Any suggestions? I'm sure I'm missing something relatively simple.
Thanks in advance!
From the form helper object (in your case builder and f) you should be able to access the model object and the url your looking for like this:
<%= image_tag f.object.image_url(:thumb) %>
The image in image_url depends on how you named the attribute, but for your sample this should be correct.
You may want to investigate the paperclip gem: https://github.com/thoughtbot/paperclip
It lets you do this to show a thumbnail of the existing picture.
<div class="field">
<% if #thing.logo? %>
<%= image_tag #thing.logo(:thumb) %><br/>
Change
<% end %>
<%= f.label :logo %>
<%= f.file_field :logo %>
</div>
I have a model "tube" which is a database having the various data for vacuum tubes. I want to dynamically loop through all the columns and create a basic table for my "new" and "edit" pages.
I grab the attribute names like this:
<% attr_array = #tube.attribute_names %>
And I want to do something like this:
<% attr_array.each{|x| text_field :x } %>
in hopes of dynamically generating this:
<%= form_for #tube do |f| %>
<%= f.label :name, :class=>'std_label' %>:
<%= f.text_field :name, :class=>'std_input' %>
<%= f.label :functional_class, :class=>'std_label' %>:
<%= f.text_field :functional_class, :class=>'std_input' %>
<%= f.label :base_type, :class=>'std_label' %>:
<%= f.text_field :base_type, :class=>'std_input' %>
.... and so forth ....
<%= f.submit %> <% end %>
But of course this does not work, not by a long shot. How can I generate my text_field inputs dynamically based on the attribute_names array? The table I am using has about 30 attributes and I think it's silly to build them all by hand, especially given that if they change in the future then the code will break. Googling and reading the API have given me the lectures on why this doesn't work, but has left me hi and dry with a code example of what does.
Accurate help appreciated.
What about:
<%= form_for #tube do |f| %>
<% #tube.attribute_names.each do |attr| %>
<%= f.text_field attr, :class=>'std_input' %>
<%= f.label attr, :class=>'std_label' %>:
<% end %>
<%= f.submit %>
<% end %>
I'm attempting to edit a model's nested attributes, much as outline here, replicated here:
<%= form_for #person do |person_form| %>
<%= person_form.text_field :name %>
<% for address in #person.addresses %>
<%= person_form.fields_for address, :index => address do |address_form|%>
<%= address_form.text_field :city %>
<% end %>
<% end %>
<% end %>
In my code, I have the following:
<%= form_for(#meal) do |f| %>
<!-- some other stuff that's irrelevant... -->
<% for subitem in #meal.meal_line_items %>
<!-- # Edit 2: I need to display information here about the subitem
Which I can't find a way to pass it to the partial, or work in
this manner for existing items
-->
<%= subitem.food.name %>
<%= subitem.food.calories %>
<%= f.fields_for subitem, :index => subitem do |line_item_form| %>
<%= line_item_form.label :servings %><br/>
<%= line_item_form.text_field :servings %><br/>
<%= line_item_form.label :food_id %><br/>
<%= line_item_form.text_field :food_id %><br/>
<% end %>
<% end %>
<%= f.submit %>
<% end %>
This works great, except, when I look at the HTML, it's creating the inputs that look like the following, failing to input the correct id and instead placing the memory representation(?) of the model. As a result, an update fails:
<input type="text" value="2" size="30" name="meal[meal_line_item][#<MealLineItem:0x00000005c5d618>][servings]" id="meal_meal_line_item_#<MealLineItem:0x00000005c5d618>_servings">
EDIT:
The reason I'm attempting to do it in this method is that I need to gather some information on associations for existing meal_line_items. For example, in the area where I took out code, I have some code to the effect of:
<%= subitem.food.name %>
<%= subitem.food.calories %>
Getting this information won't work if I am using a form builder with partials, at least, not in my trials.
Edit 2:*
See the edit in the code. Here's my MealLineItem
class MealLineItem < ActiveRecord::Base
# Associations ---------------------
belongs_to :food
belongs_to :meal
end
And meal accepts_nested_attributes for the model. As you can see it belongs to both food and meal model. For the existing meal_line_item I need to do something like:
meal_line_item.food.name
Is there f. missing from <%= fields_for?
--edit
Have you tried:
<%= f.fields_for 'meal[meal_line_item][]', subitem do |line_item_form| %>
--edit
Docs say that it should work without loop too:
<%= form_for(#meal) do |f| %>
<!-- some other stuff that's irrelevant... -->
<%= f.fields_for :meal_line_items do |line_item_form| %>
<%= line_item_form.label :servings %><br/>
<%= line_item_form.text_field :servings %><br/>
<%= line_item_form.label :food_id %><br/>
<%= line_item_form.text_field :food_id %><br/>
<% end %>
<%= f.submit %>
<% end %>
Have to test this but maybe this approach?
_form
<%= form.fields_for :meal_line_items do |meal_line_item_form| %>
<% #meal.meal_line_items.each do |meal_line_item| %>
<%= render :partial => "meal_line_items/meal_line_item", :locals => { :meal_line_item_form => meal_line_item_form, :meal_line_item => meal_line_item } %>
<% end %>
<% end %>
meal_line_items/_meal_line_item.erb
<%= meal_line_item_form.label :servings %><br/>
<%= meal_line_item_form.text_field :servings %><br/>
<%= meal_line_item_form.label :food_id %><br/>
<%= meal_line_item_form.text_field :food_id %><br/>
EDIT
here's a link to an example for setting the formbuilder iterator directly (Rails 2.3.8 though). The associations between Outbreak -> Incidents -> Location should be similiar to the ones for Meal -> Meal_line_items -> Food.
AJAX update of accepts_nested_attributes_for partials
After searching high and low, I found the error. Although I was modifying the partial and was receiving a NameError it's because I was calling the partial from a helper method - exactly the same problem as stated in the following question:
rails fields_for render partial with multiple locals producing undefined variable