Class: Roda::Component::Form

Inherits:
Object
  • Object
show all
Extended by:
Delegates
Includes:
Validations
Defined in:
lib/roda/component/form.rb,
lib/roda/component/form/validations.rb

Defined Under Namespace

Modules: Delegates, Validations Classes: Attributes

Class Method Summary collapse

Instance Method Summary collapse

Methods included from Delegates

_delegates

Methods included from Validations

#errors, #valid?, #validate

Constructor Details

#initialize(atts, options = {}) ⇒ Form

Initialize with a hash of attributes and values. If extra attributes are sent, a NoMethodError exception will be raised.

Examples:


class EditPost < Scrivener
  attr_accessor :title
  attr_accessor :body

  def validate
    assert_present :title
    assert_present :body
  end
end

edit = EditPost.new(title: "Software Tools")

edit.valid? #=> false

edit.errors[:title] #=> []
edit.errors[:body]  #=> [:not_present]

edit.body = "Recommended reading..."

edit.valid? #=> true

# Now it's safe to initialize the model.
post = Post.new(edit.attributes)
post.save


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# File 'lib/roda/component/form.rb', line 88

def initialize(atts, options = {})
  @_data    = atts
  @_data    = atts.to_obj if atts.is_a? Hash
  @_options = options

  # @_attributes = Class.new(Attributes).new
  @_attributes = Attributes.new
  @_attributes.set_attr_accessors _attr_accessors
  @_attributes.set_values _data

  _data.each do |key, val|
    send("#{key}=", val)
  end

  _form.each do |key, klass|
    opts = {}
    opts[key] = klass.new(_data.send(key)) if _data.respond_to?(key)
    @_attributes.set_values opts

    send("#{key}=", opts[key])
  end
end

Dynamic Method Handling

This class handles dynamic methods through the method_missing method

#method_missing(method, *args, &block) ⇒ Object 



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# File 'lib/roda/component/form.rb', line 131

def method_missing method, *args, &block
  # respond_to?(symbol, include_all=false)
  if _data.respond_to? method, true
    _data.send method, *args, &block
  else
    return if method[/\=\z/]

    super
  end
end

Class Method Details

.attr_accessor(*vars) ⇒ Object 



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# File 'lib/roda/component/form.rb', line 111

def self.attr_accessor(*vars)
  @_attr_accessors ||= []
  @_form ||= {}

  vars.each do |v|
    if !v.is_a? Hash
      @_attr_accessors << v unless @_attr_accessors.include? v
    else
      v = v.first

      unless @_attr_accessors.include? v.first
        @_attr_accessors << v.first
        @_form[v.first] = v.last
      end
    end
  end

  _delegates(*_attr_accessors)
end

Instance Method Details

#_attributes ⇒ Object 



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# File 'lib/roda/component/form.rb', line 268

def _attributes
  @_attributes ||= {}
end

#attributes ⇒ Object

Return hash of attributes and values.



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# File 'lib/roda/component/form.rb', line 143

def attributes
  Hash.new.tap do |atts|
    _attributes.instance_variables.each do |ivar|
      # todo: figure out why it's setting @constructor and @toString
      next if ivar == :@constructor || ivar == :@toString || ivar == :@_attributes || ivar == :@_data || ivar == :@_forms

      att = ivar[1..-1].to_sym
      atts[att] = _attributes.send(att)
    end
  end
end

#display_errors(options = {}) ⇒ Object Also known as: render_errors 



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# File 'lib/roda/component/form.rb', line 186

def display_errors options = {}
  dom = options.delete(:dom) || _dom
  d_errors = errors

  if override_errors = options[:override_errors]
    d_errors = override_errors
  end

  keys = options.delete(:keys) || (_options[:key] ? [_options[:key]] : [])

  if extra_errors = options.delete(:errors)
    extra_errors.each do |key, value|
      d_errors[key] = value
    end
  end

  d_errors.each do |key, error|
    d_keys = (keys.dup << key)

    error = error.first

    if error.is_a?(Hash)
      d_options = options.dup
      d_options[:keys] = d_keys
      d_options[:override_errors] = d_errors[key].first

      display_errors d_options
    else
      name = d_keys.each_with_index.map do |field, i|
        i != 0 ? "[#{field}]" : field
      end.join

      if tmpl = options[:tmpl]
        if client?
          field_error_dom = DOM.new(`#{tmpl.dom}[0].outerHTML`)
        else
          field_error_dom = DOM.new(tmpl.dom.to_html)
        end
      else
        field_error_dom = DOM.new('<span class="field-error"><span>')
      end

      field_error_dom.html _error_name(key, error)

      field = dom.find("[name='#{name}']")
      field.before field_error_dom.dom
    end
  end
end

#model_attributes(data = attributes) ⇒ Object 



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# File 'lib/roda/component/form.rb', line 155

def model_attributes data = attributes
  hash = {}

  data.each do |k, v|
    if klass = _form[k.to_s.to_sym]
      data = data[k]
      data = data.attributes if data.is_a?(Form)

      f = klass.new data
      k = "#{k}_attributes"
      data = f.model_attributes

      hash[k] = model_attributes data
    elsif v.is_a? Hash
      hash[k] = model_attributes data[k]
    else
      hash[k] = v
    end
  end

  hash
end

#render_values(dom = false, key = false, data = false) ⇒ Object 



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# File 'lib/roda/component/form.rb', line 237

def render_values dom = false, key = false, data = false
  dom = _options[:dom] unless dom
  key = _options[:key] if !key && _options.key?(:key)

  dom.find('input, select, textarea') do |element|
    name  = element['name']
    name  = name.gsub(/\A#{key}/, '') if key
    keys  = name.gsub(/\A\[/, '').gsub(/[^a-z0-9_]/, '|').gsub(/\|\|/, '|').gsub(/\|$/, '').split('|')
    value = false

    keys.each do |k|
      begin
        value = value ? value.send(k) : send(k)
      rescue
        value = ''
      end
    end

    case element.name
    when 'select'
      element.find('option') do |x|
        x['selected'] = true if x['value'] == value.to_s
      end
    when 'input'
      element['value'] = value.to_s
    when 'textarea'
      element.val value.to_s
    end
  end
end

#slice(*keys) ⇒ Object 



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# File 'lib/roda/component/form.rb', line 178

def slice(*keys)
  Hash.new.tap do |atts|
    keys.each do |att|
      atts[att] = _attributes.send(att)
    end
  end
end