Class: Skyline::Content::MetaData::Field

Inherits:
OpenStruct
  • Object
show all
Defined in:
lib/skyline/content/meta_data/field.rb

Overview

:nodoc:

Direct Known Subclasses

ClassSettings

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(*params) ⇒ Field

Returns a new instance of Field.



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# File 'lib/skyline/content/meta_data/field.rb', line 15

def initialize(*params)
  super(*params)
  
  # Set implicit association data.
  if self.owner_class && reflection = self.owner_class.reflect_on_association(self.name)
    self.reflection = reflection
    self.hidden = [:edit,:create] unless self.editor || !self.hidden.nil?
  end
  
  # Check if this was a filterable field and check if:
  # * this field is a column
  # * this field is a belongs_to association
  if self.respond_to?(:filterable) && self.filterable && (!self.owner_class.column_names.include?(self.name.to_s) && (!self.association? || self.reflection.macro != :belongs_to))
    raise ArgumentError, "Cannot use filter on non-database field."
  end
  
  # Set default editors if it's not set but type is available
  if !self.respond_to?(:editor) || self.editor.blank?
    self.editor = {
      :string => :text_field,
      :boolean => :boolean,
      :datetime => :date_time,
      :timestamp  => :date_time,
      :date => :date,
      :text => :textarea
    }[self.type]
  end
end

Class Method Details

.from(field, options) ⇒ Object 



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# File 'lib/skyline/content/meta_data/field.rb', line 8

def from(field,options)
  table = field.instance_variable_get(:@table)
  options.delete(:name)
  new(table.dup.update(options))
end

Instance Method Details

#association? ⇒ Boolean

Is this field an association

Returns

Boolean

Wether or not this is an association

–

Returns:

  • (Boolean) 


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# File 'lib/skyline/content/meta_data/field.rb', line 72

def association?
  self.respond_to?(:reflection) && !self.reflection.nil?
end

#attribute_name ⇒ Object

The method/column name this field writes to. This takes foreign_keys of belongs_to associations in account.



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# File 'lib/skyline/content/meta_data/field.rb', line 101

def attribute_name
  self.association? && self.reflection.macro == :belongs_to && self.reflection.foreign_key || self.name
end

#attribute_value(record) ⇒ Object

Raises:

  • (ArgumentError) 


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# File 'lib/skyline/content/meta_data/field.rb', line 151

def attribute_value(record)
  raise(ArgumentError, "The record class (#{record.class}) and the field class (#{self.owner_class}) do not match") if !record.kind_of?(self.owner_class)
  raise(ArgumentError, "The record does not respond do this field name (#{self.name})") unless record.respond_to?(self.name)
  record.send(self.attribute_name)      
end

#column ⇒ Object

The ActiveRecord::Column object this field is related to. If empty this can be a virtual field or a field defined through a method.

Returns

ActiveRecord::Column,nil

The column object if any.

–



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# File 'lib/skyline/content/meta_data/field.rb', line 82

def column
  self.owner && self.owner.respond_to?(:columns_hash) && self.owner.columns_hash[self.name.to_s]
end

#hidden_in(scope) ⇒ Object 



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# File 'lib/skyline/content/meta_data/field.rb', line 157

def hidden_in(scope)
  self.respond_to?(:hidden) && (self.hidden == true || self.hidden.include?(scope))      
end

#inspect ⇒ Object 



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# File 'lib/skyline/content/meta_data/field.rb', line 202

def inspect
  "<Field @table=#{@table.inspect}>"
end

#klass ⇒ Object

Functions below only needed on fields with serialized attributes



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# File 'lib/skyline/content/meta_data/field.rb', line 166

def klass
  case self.type
    when :integer       then Fixnum
    when :float         then Float
    when :decimal       then BigDecimal
    when :datetime      then Time
    when :date          then Date
    when :timestamp     then Time
    when :time          then Time
    when :text, :string then String
    when :binary        then String
    when :boolean       then Object
    else nil
  end
end

#owner ⇒ Object 



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# File 'lib/skyline/content/meta_data/field.rb', line 132

def owner
  method_missing(:owner)
end

#owner_class ⇒ Object 



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# File 'lib/skyline/content/meta_data/field.rb', line 136

def owner_class
  if self.owner && self.owner.kind_of?(Class) && self.owner.ancestors.include?(ActiveRecord::Base)
    self.owner
  elsif self.owner
    # This is a group so we get the group's owner
    self.owner.owner
  end
end

#plural(value, alternative = nil) ⇒ Object 



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# File 'lib/skyline/content/meta_data/field.rb', line 62

def plural(value,alternative=nil)
  return alternative.to_s.humanize.pluralize if value.nil?    
  value.kind_of?(Array) && value.last || value.to_s.pluralize
end

#plural_label(alt = self.name) ⇒ Object 



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# File 'lib/skyline/content/meta_data/field.rb', line 53

def plural_label(alt=self.name)
  plural(self.label,alt)    
end

#plural_title ⇒ Object 



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# File 'lib/skyline/content/meta_data/field.rb', line 47

def plural_title
  plural(self.title,self.plural_label)
end

#singular(value, alternative = nil) ⇒ Object 



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# File 'lib/skyline/content/meta_data/field.rb', line 57

def singular(value,alternative=nil)
  return alternative.to_s.humanize if value.nil?    
  value.kind_of?(Array) && value.first || value.to_s
end

#singular_label(alt = self.name) ⇒ Object 



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# File 'lib/skyline/content/meta_data/field.rb', line 50

def singular_label(alt=self.name)
  singular(self.label,alt)
end

#singular_title ⇒ Object 



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# File 'lib/skyline/content/meta_data/field.rb', line 44

def singular_title
  singular(self.title,self.singular_label)
end

#to_param ⇒ Object 



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# File 'lib/skyline/content/meta_data/field.rb', line 206

def to_param
  self.name
end

#type ⇒ Object

The type of the associated column, or if it’s serialized the type that this serialized field was defined as.

Returns

Symbol

The type name can by any of:

*  :string   
*  :text     
*  :integer  
*  :float    
*  :decimal  
*  :datetime 
*  :timestamp
*  :time     
*  :date     
*  :binary   
*  :boolean

–



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# File 'lib/skyline/content/meta_data/field.rb', line 123

def type
  type = method_missing(:type)
  if type.kind_of?(Class) || type.blank?
    self.column && self.column.type
  else
    type
  end
end

#type_cast(value) ⇒ Object

Casts value (which is a String) to an appropriate instance. Only needed on fields that are in serialized data.



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# File 'lib/skyline/content/meta_data/field.rb', line 184

def type_cast(value)
  return nil if value.nil?
  case self.type
    when :string    then value
    when :text      then value
    when :integer   then value.to_i rescue value ? 1 : 0
    when :float     then value.to_f
    when :decimal   then ActiveRecord::ConnectionAdapters::Column.value_to_decimal(value)
    when :datetime  then ActiveRecord::ConnectionAdapters::Column.string_to_time(value)
    when :timestamp then ActiveRecord::ConnectionAdapters::Column.string_to_time(value)
    when :time      then ActiveRecord::ConnectionAdapters::Column.string_to_dummy_time(value)
    when :date      then ActiveRecord::ConnectionAdapters::Column.string_to_date(value)
    when :binary    then ActiveRecord::ConnectionAdapters::Column.binary_to_string(value)
    when :boolean   then ActiveRecord::ConnectionAdapters::Column.value_to_boolean(value)
    else value
  end
end

#unique_values ⇒ Object

Gets all unique values for this field on the owner_class. Returns arrays usable in select/options_for_select helpers.

Returns

Array[String,Array]

Array of values. If this is an association we get an array of [id,title]

–



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# File 'lib/skyline/content/meta_data/field.rb', line 92

def unique_values
  if self.association?
    self.reflection.klass.find(:all).map{|a| [a.human_id,a.id] }
  else
    self.owner_class.connection.select_values("SELECT DISTINCT(#{self.name}) FROM #{self.owner_class.table_name}")
  end
end

#update(options = {}) ⇒ Object 



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# File 'lib/skyline/content/meta_data/field.rb', line 161

def update(options={})
  options.each{|value, key| self.send("#{key}=",value)}
end

#value(record) ⇒ Object

Raises:

  • (ArgumentError) 


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# File 'lib/skyline/content/meta_data/field.rb', line 145

def value(record)
  raise(ArgumentError, "The record class (#{record.class}) and the field class (#{self.owner_class}) do not match") if !record.kind_of?(self.owner_class)
  raise(ArgumentError, "The record does not respond do this field name (#{self.name})") unless record.respond_to?(self.name)
  record.send(self.name)
end