Class: Lore::GUI::Form_Generator

Inherits:
Object
  • Object
show all
Includes:
Aurita::GUI
Defined in:
lib/lore/gui/form_generator.rb

Overview

A factory rendering Aurita::GUI:Form instances for Aurita::Model classes.

Usage: 

generator = Lore_Form_Generator.new(Some_Lore_Model)
generator.params = { :action => '/aurita/dispatch', :onsubmit => "alert('submitting'); " }
generator.generate
puts generator.form

Constant Summary collapse

@@type_field_map = 
{ 
  :default                    => Proc.new { |l,f| Input_Field.new(:label => l, :name => f) }, 
  Lore::PG_BOOL               => Proc.new { |l,f| Boolean_Field.new(:label => l, :name => f) }, 
  Lore::PG_VARCHAR            => Proc.new { |l,f| Input_Field.new(:label => l, :name => f) }, 
  Lore::PG_SMALLINT           => Proc.new { |l,f| Input_Field.new(:label => l, :name => f) }, 
  Lore::PG_INT                => Proc.new { |l,f| Input_Field.new(:label => l, :name => f) }, 
  Lore::PG_TEXT               => Proc.new { |l,f| Textarea_Field.new(:label => l, :name => f) }, 
   Lore::PG_TIMESTAMP_TIMEZONE => Proc.new { |l,f| Datetime_Field.new(:label => l, :name => f, 
                                                                     :date_format => 'dmy', 
                                                                     :time_format => 'hms', 
                                                                     :year_range => (2009..2020)) }, 
   Lore::PG_TIMESTAMP          => Proc.new { |l,f| Datetime_Field.new(:label => l, :name => f, 
                                                                     :date_format => 'dmy', 
                                                                     :time_format => 'hms', 
                                                                     :year_range => (2009..2020)) },
   Lore::PG_DATE               => Proc.new { |l,f| Date_Field.new(:label => l, :name => f, 
                                                                 :date_format => 'dmy', 
                                                                 :year_range => (2009..2020)) },
   Lore::PG_TIME               => Proc.new { |l,f| Time_Field.new(:label => l, :name => f, 
                                                                 :time_format => 'hm') }
}

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(klass = nil) ⇒ Form_Generator

Returns a new instance of Form_Generator.



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# File 'lib/lore/gui/form_generator.rb', line 26

def initialize(klass=nil)
  @klass           = klass
  @labels          = {}
  @params          = {}
  @custom_elements = {}
  @form            = false
  @form_class      = Aurita::GUI::Form
end

Instance Attribute Details

#custom_elements ⇒ Object

Returns the value of attribute custom_elements.



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# File 'lib/lore/gui/form_generator.rb', line 24

def custom_elements
  @custom_elements
end

#form ⇒ Object (readonly)

Returns the value of attribute form.



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# File 'lib/lore/gui/form_generator.rb', line 23

def form
  @form
end

#form_class ⇒ Object

Returns the value of attribute form_class.



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# File 'lib/lore/gui/form_generator.rb', line 24

def form_class
  @form_class
end

#klass ⇒ Object (readonly)

Returns the value of attribute klass.



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# File 'lib/lore/gui/form_generator.rb', line 23

def klass
  @klass
end

#labels ⇒ Object

Returns the value of attribute labels.



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# File 'lib/lore/gui/form_generator.rb', line 24

def labels
  @labels
end

#params ⇒ Object

Returns the value of attribute params.



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# File 'lib/lore/gui/form_generator.rb', line 24

def params
  @params
end

Instance Method Details

#generate ⇒ Object 



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# File 'lib/lore/gui/form_generator.rb', line 76

def generate
  @form = @form_class.new(@params)
  model_labels   = @klass.attribute_labels if @klass.respond_to?(:attribute_labels)
  model_labels ||= {}

  @klass.get_fields.each_pair { |table, attributes|

    attributes.each { |attribute|
      label_tag    = "#{table.gsub('.','--')}--#{attribute}"
      label        = @labels[label_tag]
      label        = attribute.to_s.capitalize if label.to_s == ''

      full_attrib  = "#{table}.#{attribute}"
      field_name   = full_attrib
      form_element = false

      attributes   = @klass.__attributes__
      associations = @klass.__associations__

      constraints  = attributes.constraints
      constraints  = constraints[table] if constraints
      constraints  = constraints[attribute] if constraints

      aggregate_klasses = associations.aggregate_klasses
      has_a_klasses     = associations.has_a
      implicits         = attributes.implicit
      ecplicits         = attributes.explicit
      requireds         = attributes.required
      primary_keys      = attributes.primary_keys
      attribute_types   = attributes.types
      
      # @custom_elements is a hash mapping attribute 
      # names to Custom_Element instances. 
      if ((@custom_elements[table]) and
          (@custom_elements[table][attribute])) then
        
        form_element = @custom_elements[table][attribute].new(:label => label, 
                                                              :id    => full_attrib, 
                                                              :name  => field_name)
        
      elsif (primary_keys[table].nil? or                   # Ignore primary key attributes
             !primary_keys[table].include? attribute) and 
            (implicits[table].nil? or                      # Ignore implicit attributes
             !implicits[table].include? attribute) and 
            (has_a_klasses.nil? or                         # Ignore attributes aggregated via has_a associations (added later)
             has_a_klasses[full_attrib].nil?) 
    #   and (hidden_attributes[table].nil? or              # Ignore otherwise hidden attributes
    #       !hidden_attributes[table].include? attribute)
      then
        form_element = field_for(attribute_types[table][attribute], :name => field_name, :label => label)
      elsif (!has_a_klasses.nil? and
             !has_a_klasses[full_attrib].nil?)
      then 
        foreign_klass   = has_a_klasses[full_attrib]
        form_element    = Aurita::GUI::Lore_Model_Select_Field.new(foreign_klass, :label => label, :name => field_name)

      elsif (!aggregate_klasses.nil? and
             !aggregate_klasses[full_attrib].nil?)
      then 
        foreign_klass   = aggregate_klasses[full_attrib]
        form_element    = Aurita::GUI::Lore_Model_Select_Field.new(foreign_klass, :label => label, :name => field_name)
        
      elsif (!implicits[table].nil? and 
              implicits[table].include? attribute)
      then
        # Implicit field, ignored
      end

      if form_element then
        form_element.data_type = attribute_types[table][attribute] 
        if(!requireds[table].nil? and 
            requireds[table].include? attribute) then
          form_element.required!
        end
        if constraints then
          if constraints[:minlength] then
          end
          if constraints[:maxlength] then
          end
          if constraints[:format] then
          end
        end
        @form.add(form_element) 
      end
    }
  }
  return @form
end