Class: RubyMVC::Models::ActiveRecordTableModel

Inherits:
TableModel show all
Defined in:
lib/ruby_mvc/models/ar_table_model.rb

Overview

This class provides an adapter between the ActiveRecord model classes and the RubyMVC TableModel interface. This class is designed to be able to provide access to either all instances of a particular AR table or only a subset of the rows matching a particular query.

Instance Attribute Summary collapse

Instance Method Summary collapse

Methods inherited from Model

#[]=, adapt, #each_label, #is_editable?, #label_for, #labels, #link_labels

Methods included from Toolkit::SignalHandler::ClassMethods

#signal, #signals, #valid_signal!, #valid_signal?

Methods included from Toolkit::SignalHandler

#signal_connect, #signal_disconnect, #signal_emit

Constructor Details

#initialize(entity_type, options = {}) ⇒ ActiveRecordTableModel

Returns a new instance of ActiveRecordTableModel.



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# File 'lib/ruby_mvc/models/ar_table_model.rb', line 38

def initialize(entity_type, options = {})
  super()
  @row_idx = []
  @entity_type = entity_type
  @rows = options[:rows]
  @filter = options[:filter]
  @keys = @entity_type.attribute_names.sort

  # FIXME: this is a hack because I'm not sure how best to
  # ensure we have the rows we need
  self.each { |r| }
end

Instance Attribute Details

#entity_type ⇒ Object (readonly)

Returns the value of attribute entity_type.



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# File 'lib/ruby_mvc/models/ar_table_model.rb', line 36

def entity_type
  @entity_type
end

#keys ⇒ Object (readonly)

Returns the value of attribute keys.



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# File 'lib/ruby_mvc/models/ar_table_model.rb', line 36

def keys
  @keys
end

Instance Method Details

#[](index) ⇒ Object 



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# File 'lib/ruby_mvc/models/ar_table_model.rb', line 96

def [](index)
  @row_idx[index]
end

#create_rows(count = 1) ⇒ Object 



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# File 'lib/ruby_mvc/models/ar_table_model.rb', line 51

def create_rows(count = 1)
  rows = []
  count.times { rows << @entity_type.new(@filter) }
  rows
end

#each(&block) ⇒ Object 



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# File 'lib/ruby_mvc/models/ar_table_model.rb', line 100

def each(&block)
  @row_idx.clear
  _rows.each do |row|
    @row_idx << row
    block.call(row)
  end
end

#each_with_index(&block) ⇒ Object 



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# File 'lib/ruby_mvc/models/ar_table_model.rb', line 108

def each_with_index(&block)
  @row_idx.clear
  _rows.each_with_index do |row, i|
    @row_idx << row
    block.call(row, i)
  end
end

#insert_row(index, row) ⇒ Object 



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# File 'lib/ruby_mvc/models/ar_table_model.rb', line 57

def insert_row(index, row)
  @row_idx.insert(index, row)
  super(index, row)
end

#insert_rows(index, rows) ⇒ Object 



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# File 'lib/ruby_mvc/models/ar_table_model.rb', line 62

def insert_rows(index, rows)
  if index == -1
    @row_idx.concat(rows)
  else
    rows.each_with_index do |row, i|
      @row_idx.insert(index + i, row)
    end
  end
  super(index, rows)
end

#remove_row(index) ⇒ Object 



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# File 'lib/ruby_mvc/models/ar_table_model.rb', line 73

def remove_row(index)
  if row = @row_idx.delete_at(index)
    @entity_type.delete(row[@entity_type.primary_key])
    signal_emit("rows-removed", self, index, [ row ])
  end
  row
end

#remove_rows(index, count) ⇒ Object 



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# File 'lib/ruby_mvc/models/ar_table_model.rb', line 81

def remove_rows(index, count)
  rows = []
  count.times do
    rows << @row_idx.delete_at(index)
    @entity_type.delete(rows.last[@entity_type.primary_key])
  end
  signal_emit("rows-removed", self, index, rows)
  rows
end

#size ⇒ Object 



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# File 'lib/ruby_mvc/models/ar_table_model.rb', line 120

def size
#      puts "idx.size: #{@row_idx.size}"
  [_rows.count, @row_idx.size].max
end

#update_row(index, row) ⇒ Object 



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# File 'lib/ruby_mvc/models/ar_table_model.rb', line 91

def update_row(index, row)
  @row_idx[index] = row
  super
end

#value_for(row, key) ⇒ Object 



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# File 'lib/ruby_mvc/models/ar_table_model.rb', line 116

def value_for(row, key)
  @row_idx[row][key]
end