Ruby on Rails搜索表单

Question

I'm new to RoR and I've managed to make a basic search form but keep getting errors when trying to expand the search tags (name).. I have a model with various data (location, website, email, telephone) and was wondering how I can add these to my current search code.

/models/ciir.rb

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

static_pages_controller.rb

def home
  @ciirs = Ciir.search(params[:search])
end

/home.html.erb

<%= form_tag ciirs_path, :method => 'get' do %>
  <p>
    <%= text_field_tag :search, params[:search] %>
    <%= submit_tag " Search Database Records ", :name => nil %>
  </p>
<% end %>

When clicking the submit button (no search terms) the url is:

ciirs?utf8=✓&search=

but when modifying the name condition to something like 'website' the url changes to

ciirs?utf8=✓&search=&commit=+Search+Database+Records+ –

Answer 1

Since you mentioned you are new to RoR, I must share the way I learned RoR was reading, using and analyzing one issue at a time. I would suggest you to take a look at following points one at a time and try & learn how RoR treats them and how these fit your question:

1. How form_tag works?

2. How text_field_tag works?

3. Once you have understood form_tag , difference between text_field_tag and f.text_field ?

4. How params objects are created, and it uses names of form controls?

5. How and when to use GET and/or POST form methods? Inadvertently, what are different types of method and when to use them?

6. How URL are used in the form_tag and what components are they made of?

7. Sprinkle a bit of knowledge of Ruby language by learning between Array s and Hash es? In fact, learn Ruby as much as you can.

Answering your question,

/home.html.erb

<%= form_tag "/static_pages/home", :method => 'post' do %>
  <p>
    <%= text_field_tag "search[name]", params.has_key?("search") && params[:search].has_key?("name") ? params[:search][:name] : "" %>
    <%= submit_tag " Search Database Records " %>
  </p>
<% end %>

/models/ciir.rb

def self.search(search)
  if search
    find(:all, :conditions => ["name LIKE '%?%'", search[:name]])
  else
    find(:all)
  end
end

So I modified your form, and told RoR about search params containing data for name .

params is a Hash (which is a key-value pair ) having key named search , which further is a Hash having key named name .

The same principle is followed in the model code. We passed the Hash of key search to the function and in there, used the value of key named name .

I also updated the url in form_tag , to point it to home action of your controller. Assuming that you have added it to your routes.rb file, it usually follows the pattern controller_name/action_name or the function name action_name_controller_name_path or action_name_controller_name_url . Run rake routes command at your root directory to list out all paths in your application.

Also note, I used POST method instead of original GET . You may wish to use GET here, so please change it back.

I hope this works.

Answer 2

I found no error in your code. the url changed to ciirs?utf8=✓&search=&commit=+Search+Database+Records+ is normal. submit_tag generates a button named "commit" defaultly, it will be parsed in the params. I see you add :name => nil , it will fix the problem, the other part of your code needn't to be modified. I copied your code and tested it, it ran smoothly.