New to rails so I am implementing a basic app.
Text field and a submit button, on clicking the submit button the text to be displayed on the div placed below the submit button of the index page.
Code and things I trying is as follows -
Siteurl - http://localhost:3000/lists/index
list controller code -
class ListsController < ApplicationController
def index
List.all
end
def add
#message = params[:todo_text]
List.create(:title => #message)
redirect_to '/lists/index', :notice => "Notice"
end
end
Model list.rb -
class List < ActiveRecord::Base
attr_accessible :title
end
Views list index.html.erb code -
<div id="search">
<%= form_tag("/lists/add", :method=>"post") do %>
<%= text_field_tag(:todo_text, '',:class=>"formtext" ) %>
<%= submit_tag("Add Message", :class=>"submit") %>
<% end %>
</div>
Now when I submit some text it redirects to the same..but data is not reverting back to the page. Let me know what I am doing wrong and how do i fix it ?
in controller
def index
#lists = List.all
end
in index.html.erb
<% #lists.each do |list| %>
...
<% end %>
try
<%= form_for #list, :url => { :action => "add" } do |f| %>
controller
def index
#lists = List.all
end
def add
#list = List.new(params[:title])
redirect_to #lists, :notice => "Notice"
end
Related
I'm using rails 4.0.8. I added a comment section to a model called 'Things', but I keep getting the same error "param is missing or the value is empty: thing" when I press the submit comment button. It says the error is in the Things#Controller. What am I doing wrong?
UPDATE: I removed the url path from the form, but a new error returns "Couldn't find Thing without an ID". The error is in Comments#Controller.
VIEW FOR THING/SHOW
<div id= "thing">
<h1>
<%= #thing.name %>
</h1>
<br>
<div id= "commentsection">
Comments
<div id= "comments">
<br>
<% #thing.comments.each do |c| %>
<%= c.username %>
<br>
<%= c.text %>
<% end %>
<%= form_for #comment, :url => thing_path do |f| %>
<%= f.label :username %>
<%= f.text_field :username %>
<%= f.label :comment %>
<%= f.text_field :text %>
<%= f.submit "Enter", class: "btn btn-small btn-primary" %>
<% end %>
</div>
</div>
</div>
THINGS CONTROLLER
class ThingsController < ApplicationController
def show
#thing = Thing.find(params[:id])
#thing.comments.build
#comment = Comment.new
end
def index
end
def new
#thing = Thing.new
#things = Thing.all
end
def create
#thing = Thing.new(thing_params)
if #thing.save
redirect_to #thing
else
render 'new'
end
end
private
def thing_params
params.require(:thing).permit(:name, :avatar)
end
end
COMMENTS CONTROLLER (I put asterisks around the line where the error is)
class CommentsController < ApplicationController
def show
#comment = Comment.find(params[:id])
end
def new
#comment = Comment.new
#comments = Comment.all
end
def create
****#thing = Thing.find(params[:thing_id])****
#comment = #thing.comments.create(comment_params)
redirect_to thing_path(#thing)
end
end
private
def comment_params
params.require(:comment).permit(:user, :text, :upvotes, :downvotes, :thing_id)
end
end
ROUTES
Website::Application.routes.draw do
get "comments/new"
get "comments/show"
get "things/new"
root 'home_page#home'
get "all/things/new" => 'things#new'
get "all/allthings"
resources :things
resources :good_comments
get "things/show"
get "things/results"
end
You are posting the #comment form to post '/things' path.
<%= form_for #comment, :url => thing_path do |f| %>
It should just be <%= form_for #comment do %> (Rails is smart enough to plug in the comments_path) or if you feel like being more explicit (even though it's not necessary)
<%= form_for #comment, url: :comments_path do %>
Another note though, if you want that Comment to be tied to that specific Thing then in your models it should be
Class Thing
has_many :comments
end
Class Comment
belongs_to :thing
end
Then make sure in your database comment has a thing_id foreign_key field and then your form for comment should actually look like
<%= form_for #thing, #comment do %>
<% end %>
I am implementing ancestry on a nested resource.
resources :loads do
resources :messages
end
Here is my index action
def index
load = Load.find(params[:load_id])
#messages = load.messages.scoped
#message = load.messages.new
end
My index.html.erb is throwing the following error.
Missing partial messages/message with {:locale=>[:en],
:formats=>[:html], :handlers=>[:erb, :builder, :coffee]}. Searched in:
* "C:/Sites/final/cloud/app/views"
My index.html.erb is as follow
<% title "Messages" %>
<%= nested_messages #messages.arrange(:order => :created_at) %>
<%= render "form" %>
Here is my nested_message definition
module MessagesHelper
def nested_messages(messages)
messages.map do |message, sub_messages|
render(message) + content_tag(:div, nested_messages(sub_messages), :class => "nested_messages")
end.join.html_safe
end
end
Here is my _message.html.erb
<div class="message">
<div class="created_at"><%= message.created_at.strftime("%B %d, %Y") %></div>
<div class="content">
<%= link_to message.content, message %>
</div>
<div class="actions">
<%= link_to "Reply", new_load_message_url(:parent_id => message) %> |
<%= link_to "Destroy", [message.load, message], :confirm => "Are you sure?", :method => :delete %>
</div>
</div>
Any help appreciated.
This error states that your application has tried to search for a partial _messages.html.erb, as a result of this the partial must not be in your /app/views/messages which results in the message you are being shown. Check your messages directory and check if you have this partial. Going by your nested resources I am guessing your association between Load and Message is:
class Load < ActiveRecord::Base
has_many :messages
end
class Message < ActiveRecord::Base
belongs_to :load
end
Further more I noticed that you have the following line in your index action: #message = load.messages.new surely this does not seem right. Because what your telling your application to do is when the controller recieves a response to render the index action it should also create message by doing #message = load.messages.new which is why it is trying to render the partial.
To clarify things a bit more for you. If in your application you had a link_to to create a new user. Upon clicking the new user it will do something like:
def new
#user = User.new
respond_to do |format|
format.html # new.html.erb
format.json { render json: #user }
end
end
And will render `app/views/users/new.html.erb which inside this will most probably have a
<%= form_for #user do |f| %>
<%= render :partial => 'form', :locals => { :f => f } %>
<% end %>
This will call your partial which in normal cases would be _form.html.erb. The create action of a particular controller will come into play when you attempt to save the partial. Usually a create block for a controller will look like this:
def create
#title = "Create a user"
#user = User.new(params[:user])
if #user.save
redirect_to usermanagement_path
flash[:success] = "Created successfully."
else
#title = "Create a user"
render 'new'
end
end
Here inside the create action when your _form.html.erb or _message.html.erb is submitted it will try to create a new user by passing in the user through the params. I do thoroughly believe that your issue may potentially well be:
1) Your missing your _message.html.erb
2) Also you are calling a .new inside your index action.
Hope this clears this up for you.
I've followed this Railscast on submitting a form via Ajax and updating a div without reloading the page, but I'm having trouble with one portion of it.
Ryan has $("#products").html("<%= escape_javascript(render(#products)) %>"); in an index.js.erb file to update the #products div when the form is submitted. I'm struggling to understand whether an instance variable like #products is relevant for my situation, or if I can simply substitute it for a URL.
I'm trying to do the same thing as Ryan in this screencast, but instead of display search results I just want to display the updated value.
In show.html.erb I have:
<% #project.project_todos.order("created_at DESC").where(:status => false).each do |todo|%>
<%= form_for todo, :remote => true, :"data-replace" => "#dueon" do |f| %>
<%= f.text_field :due %>
<%= f.submit :class => "primary", :value => "Add" %>
<% end %>
<div id="dueon">
<%= render "duedate", :todo => todo %>
</div>
<% end %>
The partial _duedate.html.erb has one line in it: <%= todo.due %>
So in my index.js.erb I currently have this: $("#dueon").html("<%= escape_javascript(render("_duedate")) %>"); but it's clearly not working. Do I have to use a variable here in place of the _duedate? And if so, how would I set this up in the controller? I mean what does the variable have represent?
Also, for what it's worth, the partial is rendering correctly and displaying the todo.due value...it's just not updating when I submit the form.
ProjectsController:
def show
#project = Project.find(params[:id])
# Display the form to create a new todo
#project_todo = ProjectTodo.new
respond_to do |format|
format.html # show.html.erb
format.json { render :json => #project }
end
end
Try this
in you controller action , (say sample_action)
def sample_action
#todos = #your code
respond_to do |format|
format.js
end
end
and you have a sample_action.js.erb
$("#dueon").html("<%= raw escape_javascript(render(:partial => 'duedate')) %>")
then inside the partial, you have access to the new #todos instance variable
HTH
I will answer you separately as I believe your entire setup should be little change (IMO, this might not be the case)
I think you should have a todos controller with a project belongs to it,
--- models ----------------
class Project < ActiveRecord::Base
has_many :todos
end
class Todo < ActiveRecord::Base
belongs_to :project
end
---- routes ---------------
resources :projects do
resources :todos do
end
end
---- controllers ----------
class ProjectsController < ApplicationController
end
class TodosController < ApplicationController
def new
#project = Project.find(params[:project_id])
#todos = #project.todos.build
end
end
in your view (views/todos.html.erb)
<%= #project.name %>
<%= form_for([#Project, #todos]) do |f| %>
#todo form code
<% end%>
As per the relation, project has many todos, its always clear to show the project details in the todo add screen, rather than allowing users to add new todos from project screen.
and again, this is my personal view, feel free to ask any questions :)
I have a table of venues and offers. Each venue can have have many offers.
I would like to be able to add the offers to the venues from the venues edit page. So far I have this (code below) but its giving a "NoMethodError in Venues#edit, undefined method `model_name' for NilClass:Class" error.
venues edit page
(the div id="tabs-3" is a container in an accordion)
<div id="tabs-3">
<%= form_for [#venue, #offer] do |f| %>
<h2 class="venue_show_orange">Offers</h2>
<%= f.fields_for :offers do |offer| %>
<div class="add_offer">
<%= offer.text_field :title %><br>
</div>
<div class="button"><%= submit_tag %></div>
<% end %>
<% end %>
</div>
offers controller
class OffersController < ApplicationController
def new
#offer = Offer.new
end
def create
#offer = #venue.offers.create!(params[:offer])
#offer.venue = #venue
if #offer.save
flash[:notice] = 'Offer added'
redirect_to offers_path
else
render :action => :new
end
end
def edit
#offer = Offer.find(params[:id])
end
def update
#offer = Offer.find(params[:id])
#offer.attributes = params[:offer]
if #offer.save!
flash[:notice] = 'Offer updated successfully'
redirect_to offers_path(#offer)
end
end
end
venues controller
(nothing offer related in here - is this where I'm going wrong?)
class VenuesController < ApplicationController
protect_from_forgery :only => [:update, :delete, :create]
load_and_authorize_resource
def new
#venue = Venue.new
5.times { #venue.venuephotos.build }
end
def create
#venue = Venue.new params[:venue]
if #venue.save
flash[:notice] = 'Venue added'
redirect_to venues_path
else
render :action => :new
end
end
def edit
#venue = Venue.find(params[:id])
5.times { #venue.venuephotos.build }
end
def update
#venue = Venue.find(params[:id])
#venue.attributes = params[:venue]
if #venue.save!
flash[:notice] = 'Venue updated successfully'
redirect_to :back
end
end
end
Any help is much appreciated thanks very much!
edit
venues edit page
<div id="tabs-3">
<%= form_for #venue do |f| %>
<div class="edit_venue_details">
<h2 class="venue_show_orange">Offers</h2>
<%= render :partial => 'offers/offer', :collection => #venue.offers %>
<div class="clearall"></div>
<h2 class="edit_venue_sub_header">Add a new offer</h2>
<%= f.fields_for :offers do |offer| %>
<% if offer.object.new_record? %>
<p class="edit_venue">title: <br>
<%= offer.text_field :title, :class => "edit_venue_input" %></p>
<% end %>
<% end %>
</div>
<button class="submit_button" type="submit"> Save changes</button>
<% end %>
</div>
whats being displayed
however if I add a new offer, that will display correctly:
Some remarks:
1) Replace:
<%= form_for [#venue, #offer] do |f| %>
with:
<%= form_for #venue do |f| %>
Because offers data will be updated through the related venue, only one controller action will handle the form.
2) If you want to add some unexisting offers in this form, you shoud instantiate them the way you did with venuephotos
3) Show your Venue model. You should have at least:
accepts_nested_attributes_for :offers
Fixed with:
<%= f.fields_for :offers, #venue.offers.build do |offer| %>
I have a controller that has the following index action :
def index
if request.post?
flash[:notice] = "Searching.."
redirect_to songs_path # where songs_path is this index page that i am on
end
end
in my application layout i have defined the flash section as such
<% if flash[:notice] %>
<div id='notice'><%= flash[:notice] %></div>
<% end %>
and on my pages_path i've got
<% form_for :search do |f| %>
<%= f.label :search_text %>
<%= f.text_field :search_text %>
<p>
<%= f.submit "Search" %>
</p>
<% end %>
The final result should be a search through a youtube api ( youtube-g) but now i would only wish to make that flash notification appear when i click on the "Search" button , and it doesn't .. any ideas why ?
index action ordinary is GET request. So, if in your routes.rb there is something like resources :searches then your code won't work.
try this:
def create
render :text => "Searching.."
end
because POST /searches will refer to create action
you should update your RESTful route to like this
resources :songs do
collection do
get 'search'
end
end
Then in your Controller
def search
# Perform Your search here like Youtube ..
flash[:notice] = "Searching.."
redirect_to songs_path # This should work now.
end