Class: DataMapper::Adapters::PostgresqlAdapter::Mappings::Column

Inherits:
Object
  • Object
show all
Defined in:
lib/data_mapper/adapters/postgresql_adapter.rb

Instance Method Summary collapse

Instance Method Details

#alter! ⇒ Object 



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# File 'lib/data_mapper/adapters/postgresql_adapter.rb', line 160

def alter!
  result = super
  reset_alter_state!
  result
end

#check_declaration ⇒ Object 



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# File 'lib/data_mapper/adapters/postgresql_adapter.rb', line 152

def check_declaration
	"CHECK (" << check << ")"
end

#default=(value) ⇒ Object 



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# File 'lib/data_mapper/adapters/postgresql_adapter.rb', line 171

def default=(value)
  @default_changed = true
  super
end

#reset_alter_state! ⇒ Object 



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# File 'lib/data_mapper/adapters/postgresql_adapter.rb', line 166

def reset_alter_state!
  @type_changed = false
  @default_changed = false
end

#serial_declaration ⇒ Object 



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# File 'lib/data_mapper/adapters/postgresql_adapter.rb', line 148

def serial_declaration
  "SERIAL"
end

#size ⇒ Object 



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# File 'lib/data_mapper/adapters/postgresql_adapter.rb', line 242

def size
  nil
end

#to_alter_form ⇒ Object 



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# File 'lib/data_mapper/adapters/postgresql_adapter.rb', line 181

def to_alter_form
  sql = to_sql.dup
  
  changes = 0
  
  if @type_changed
    changes += 1
    sql << " TYPE " << type_declaration
    case self.type
    when :integer then sql << " USING #{to_sql}::integer"
    when :datetime then
      sql << " USING timestamp with time zone"
    end
  end
  
  if @default_changed
    sql << ", " if changes += 1 > 1
    
    if default.blank? || default_declaration.blank?
      sql << " DROP DEFAULT"
    else
      sql << " " << default_declaration
    end
  end
  
  sql
end

#to_alter_sql ⇒ Object 



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# File 'lib/data_mapper/adapters/postgresql_adapter.rb', line 156

def to_alter_sql
  "ALTER TABLE " <<  table.to_sql << " ALTER COLUMN " << to_alter_form
end

#to_long_form ⇒ Object 



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# File 'lib/data_mapper/adapters/postgresql_adapter.rb', line 209

def to_long_form
  @to_long_form || begin
    @to_long_form = "#{to_sql}"
    
    if serial? && !serial_declaration.blank?
      @to_long_form << " #{serial_declaration}"
      if key? && !primary_key_declaration.blank?
        @to_long_form << " #{primary_key_declaration}"
      end
    else
      @to_long_form << " #{type_declaration}"
      
      unless nullable? || not_null_declaration.blank?
        @to_long_form << " #{not_null_declaration}"
      end
      
      if default && !default_declaration.blank?
        @to_long_form << " #{default_declaration}"
      end
      
      if unique? && !unique_declaration.blank?
        @to_long_form << " #{unique_declaration}"
      end
      
      if check && !check_declaration.blank?
        @to_long_form << " #{check_declaration}"
      end
    end
            
    @to_long_form
  end
end

#type=(value) ⇒ Object 



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# File 'lib/data_mapper/adapters/postgresql_adapter.rb', line 176

def type=(value)
  @type_changed = true
  super
end