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

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, rows = nil) ⇒ 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, rows = nil)
  super()
  @row_idx = []
  @entity_type = entity_type
  @rows = rows 
  @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

#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 95

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 50

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

#each(&block) ⇒ Object 



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# File 'lib/ruby_mvc/models/ar_table_model.rb', line 99

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 107

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 56

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 61

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 72

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 80

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 119

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 90

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 115

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