查看“提交时” Rails的更改

Question

Is there a way to do this without javascript?

Let me explain. I have two models, users and dogs.

I'm using the index as a home page for when the users are logged in.

There is a form that searches dogs (not by any information the user enters, it's prepopulated with dog data), but the index is listing the result of my search query on page load. I'd like it to only show when the button is submitted.

I'll show some code.

controller for dog:

def index
  if current_user
    @user = current_user
    @breed = @user.dogs.first.primarybreed
    # params[:search] = @breed
    @dog = Dog.search(params[:search]).sample
  end
end

view:

%= form_tag dogs_path, :method => :get do %>
<%= hidden_field_tag :search, @breed %>
<%= image_submit_tag("/images/greenadd.png", size: "10x10", :name => nil) %> New Doggy Playdate!
<% end %>
<div id="dogswrap">

<h1><%= current_user.dogs[0].name %> Should Meet With...</h1>

<table>
<tbody>
  <tr>
    <td><%= image_tag @dog.image.url(:medium) %></td>
    <td><%= @dog.name %></td>
    <td><%= @dog.nick %></td>
    <td><%= @dog.primarybreed %></td>
    <td><%= @dog.secondarybreed %></td>
    <td><%= @dog.age %></td>
    <td><%= @dog.weight %></td>
    <td><%= link_to "#{@dog.user.name}" %> </td>
    <td><%= image_tag @dog.user.image.url(:thumb) %> </td>

    </td>
    </tr>
</tbody>
</table>

Model

 def self.search(search)
    find(:all, :conditions => ['primarybreed LIKE ?', "%#{search}%"])
 end

I would like to have an if statement that shows the table only after the submit has been pushed.

If there is another way to do this, I'd appreciate it.

Thanks!

EDIT: Still working on this. May use a render..?

Answer 1

You can just use where in place of the way you're currently doing it find and conditions

def self.search(search)
  where('primarybreed LIKE ?', "%#{search}%")
end

One thing I've learnt when using the LIKE function in development for SQLite3 and LIKE in PostgreSQL for production, was LIKE is case-insensitive in SQLite3 but not for PSQL. You would need to use ILIKE for that.

To your main question. This is how I would do it.

def index
  if current_user
    @user = current_user
    @dogs = Dog.search(params[:search]) if params[:search].present?
  end
end

For you views, start moving everything into a partial. _form.html.erb and _dog.html.erb

form

<%= form_tag dogs_path, :method => :get do %>
  <%= text_field_tag :search %>
  <%= image_submit_tag("/images/greenadd.png", size: "10x10", :name => nil) %> New Doggy Playdate!
<% end %>

dog

<td><%= image_tag dog.image.url(:medium) %></td>
<td><%= dog.name %></td>
<td><%= dog.nick %></td>
<td><%= dog.primarybreed %></td>
<td><%= dog.secondarybreed %></td>
<td><%= dog.age %></td>
<td><%= dog.weight %></td>
<td><%= link_to "#{dog.user.name}" %> </td>
<td><%= image_tag dog.user.image.url(:thumb) %></td>

Notice removed @dog and replaced with dog

Index view

<%= render 'form' %>
<div id="dogswrap">

<h1><%= @user.dogs[0].name %> Should Meet With...</h1>

<table>
<tbody>
  <tr>
    <% if @dogs %>
      <%= render @dogs %>
    <% end %>
  </tr>
</tbody>
</table>

changed current_user.dogs[0].. to @user.dogs[0].. Also made a conditional for if the @dogs instance variable is truthy. If it is, then render will render out the _dog.html.erb partial for each dog in the @dogs collection