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https://github.com/rails-engine/form-select

Rails form select improve
https://github.com/rails-engine/form-select

actionview form rails select

Last synced: 2 months ago
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Rails form select improve

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# FormSelect

[![Build Status](https://travis-ci.org/rails-engine/form-select.svg?branch=master)](https://travis-ci.org/rails-engine/form-select)

[中文介绍与说明](https://ruby-china.org/topics/37668)

A simple improve for Rails form select helper.

We need use `form.select ::category_id, Category.collect { |record| [record.name, record.id] }` in so many case.

This gem give use a simple way.

## Usage

```rb
gem "form-select"
```

app/model/category.rb

```rb
class Category
form_select :name, scope: -> { order("name asc") }
form_select :reverse_name, field: [:name, :id], scope: -> { order("name desc") }
end

class User
form_select :login, field: [:login, :to_param], scope: -> { order("id desc") }
form_select :email
form_select :email_value, field: :email
form_select :city, field: :city, scope: -> { where("city is not null").select(:city).distinct }

def to_param
login.downcase
end
end

class Post
form_select :author, field: [:author], scope: -> { where("author is not null").select(:author).distinct }
end
```

Now you got the helper methods:

```rb
irb> Category.name_options
=> [["Android", 3], ["iOS", 2], ["News", 1]]
irb> Category.reverse_name_options
=> [["News", 1], ["iOS", 2], ["Android", 3]]
irb> User.login_options
=> [["Foo", "foo"], ["Mike", "mike"], ["Jason", "jason"]]
irb> User.email_options
=> [["[email protected]", 10], ["[email protected]", 11], ["[email protected]", 12]]
irb> User.email_value_options
=> [["[email protected]", "[email protected]"], ["[email protected]", "[email protected]"], ["[email protected]", "[email protected]"]]
irb> User.city_options
=> [["NewYork", "NewYork"], ["San Francisco", "San Francisco"], ["Chicago", "Chicago"]]
irb> Post.author_options
=> [["Jason", "Jason"], ["Mike", "Mike"], ["Foor", "Foo"]]
```

So you can easy use it in Rails form:

```erb
<%= form_with(model: post, local: true) do |form| %>


<%= form.label :title %>
<%= form.text_field :title %>


<%= form.label :user_id %>
<%= form.select :user_id, User.email_options %>


<%= form.label :city %>
<%= form.select :city, User.city_options %>


<%= form.label :category_id %>
<%= form.select :category_id, Category.name_options %>


<%= form.submit %>

<% end %>
```

## License
The gem is available as open source under the terms of the [MIT License](https://opensource.org/licenses/MIT).