class Formtastic::Inputs::NumberInput
Outputs a simple `<label>` with a HTML5 `<input type=“number”>` wrapped in the standard `<li>` wrapper. This is the default input choice for all database columns of the type `:float` and `:decimal`, as well as `:integer` columns that aren't used for `belongs_to` associations, but can be applied to any text-like input with `:as => :number`.
Sensible default values for the `min`, `max` and `step` attributes are found by reflecting on the model's validations (when provided). An `IndeterminableMinimumAttributeError` exception will be raised when the following conditions are all true:
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you haven't specified a `:min` or `:max` for the input
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the model's database column type is a `:float` or `:decimal`
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the validation uses `:less_than` or `:greater_than`
The solution is to either:
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manually specify the `:min` or `:max` for the input
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change the database column type to an `:integer` (if appropriate)
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change the validations to use `:less_than_or_equal_to` or `:greater_than_or_equal_to`
@example Full form context and output
<%= semantic_form_for(@user) do |f| %> <%= f.inputs do %> <%= f.input :shoe_size, :as => :number %> <% end %> <% end %> <form...> <fieldset> <ol> <li class="numeric"> <label for="user_shoe_size">Shoe size</label> <input type="number" id="user_shoe_size" name="user[shoe_size]"> </li> </ol> </fieldset> </form>
@example Default HTML5 min/max/step attributes are detected from the numericality validations
class Person < ActiveRecord::Base validates_numericality_of :age, :less_than_or_equal_to => 100, :greater_than_or_equal_to => 18, :only_integer => true end <%= f.input :age, :as => :number %> <li class="numeric"> <label for="persom_age">Age</label> <input type="number" id="person_age" name="person[age]" min="18" max="100" step="1"> </li>
@example Pass attributes down to the `<input>` tag with :input_html
<%= f.input :shoe_size, :as => :number, :input_html => { :min => 3, :max => 15, :step => 1, :class => "special" } %>
@example Min/max/step also work as options
<%= f.input :shoe_size, :as => :number, :min => 3, :max => 15, :step => 1, :input_html => { :class => "special" } %>
@example Use :in with a Range as a shortcut for :min/:max
<%= f.input :shoe_size, :as => :number, :in => 3..15, :step => 1 %> <%= f.input :shoe_size, :as => :number, :input_html => { :in => 3..15, :step => 1 } %>
@see Formtastic::Helpers::InputsHelper#input InputsHelper#input for full documentation of all possible options. @see api.rubyonrails.org/classes/ActiveModel/Validations/HelperMethods.html#method-i-validates_numericality_of Rails' Numericality validation documentation
Public Instance Methods
# File lib/formtastic/inputs/number_input.rb, line 82 def step_option super || "any" end
# File lib/formtastic/inputs/number_input.rb, line 75 def to_html input_wrapping do label_html << builder.number_field(method, input_html_options) end end