Friendly.rb - Your friendly European Ruby Conference Select ​
The Select field renders a select field.
field :type, as: :select, options: { 'Large container': :large, 'Medium container': :medium, 'Tiny container': :tiny }, display_with_value: true, placeholder: 'Choose the type of the container.'
Options ​
-> options
A Hash representing the options that should be displayed in the select. The keys represent the labels, and the values represent the value stored in the database.
The options get cast as ActiveSupport::HashWithIndifferentAccess objects if they are a Hash.
Default ​
nil
Possible values ​
{ 'Large container': :large, 'Medium container': :medium, 'Tiny container': :tiny } or any other Hash.
-> enum
Set the select options as an Active Record enum. You may use options or enum, not both.
# app/models/project.rb
class Project < ApplicationRecord
enum type: { 'Large container': 'large', 'Medium container': 'medium', 'Tiny container': 'small' }
end
# app/avo/resources/project_resource.rb
class ProjectResource < Avo::BaseResource
field :type,
as: :select,
enum: ::Project.types,
display_with_value: true,
placeholder: 'Choose the type of the container.'
end
Default ​
nil
Possible values ​
Post::statuses or any other enum stored on a model.
-> display_value
You may want to display the values from the database and not the labels of the options. You may change that by setting display_value to true.
# app/avo/resources/project_resource.rb
class ProjectResource < Avo::BaseResource
field :type,
as: :select,
display_with_value: true
end
Default ​
false
Possible values ​
true, false
-> include_blank
Include blank ​
The Select field also has the include_blank option. That can have three values.
If it's set to false (default), it will not show any blank option but only the options you configured.
If it's set to true and you have a placeholder value assigned, it will use that placeholder string as the first option.
If it's a string include_blank: "No country", the No country string will appear as the first option in the <select> and will set the value empty or nil depending on your settings.
# app/avo/resources/project_resource.rb
class ProjectResource < Avo::BaseResource
field :type,
as: :select,
include_blank: 'No type'
end
Default ​
nil
Possible values ​
nil, true, false, or a string to be used as the first option.
Computed options ​
You may want to compute the values on the fly for your Select field. You can use a lambda for that where you have access to the model, resource, view, and field properties where you can pull data off.
# app/avo/resources/project_resource.rb
class ProjectResource < Avo::BaseResource
field :type,
as: :select,
options: ->(model:, resource:, view:, field:) do
model.get_types_from_the_database.map { |type| [type.name, type.id] }
end,
placeholder: 'Choose the type of the container.'
end
The output value must be a supported options_for_select value.