Class: Hold::Sequel::PropertyMapper::Column

Inherits:
Hold::Sequel::PropertyMapper show all
Defined in:
lib/hold/sequel/property_mapper/column.rb

Overview

Simplest case: maps the property directly to a column on the corresponding table.

Direct Known Subclasses

CreatedAt, TransformedColumn, UpdatedAt

Instance Attribute Summary collapse

Attributes inherited from Hold::Sequel::PropertyMapper

#property, #property_name, #repository

Instance Method Summary collapse

Methods inherited from Hold::Sequel::PropertyMapper

#load_values, #post_delete, #post_insert, #post_update, #pre_delete, #pre_insert, #pre_update, setter_dependencies_for

Constructor Details

#initialize(repo, property_name, options) ⇒ Column

Returns a new instance of Column.



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# File 'lib/hold/sequel/property_mapper/column.rb', line 6

def initialize(repo, property_name, options)
  super(repo, property_name)

  @table = options[:table] || @repository.main_table

  @column_name = (options[:column_name] || property_name).to_sym
  @column_alias = :"#{@table}_#{@column_name}"
  @column_qualified = Sequel::SQL::QualifiedIdentifier.new(@table, @column_name)
  @columns_aliases_and_tables_for_select = [
    [@column_qualified],
    [Sequel::SQL::AliasedExpression.new(@column_qualified, @column_alias)],
    [@table]
  ]
end

Instance Attribute Details

#column_alias ⇒ Object (readonly)

Returns the value of attribute column_alias.



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# File 'lib/hold/sequel/property_mapper/column.rb', line 4

def column_alias
  @column_alias
end

#column_name ⇒ Object (readonly)

Returns the value of attribute column_name.



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# File 'lib/hold/sequel/property_mapper/column.rb', line 4

def column_name
  @column_name
end

#column_qualified ⇒ Object (readonly)

Returns the value of attribute column_qualified.



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# File 'lib/hold/sequel/property_mapper/column.rb', line 4

def column_qualified
  @column_qualified
end

#columns_aliases_and_tables_for_select ⇒ Object (readonly)

Returns the value of attribute columns_aliases_and_tables_for_select.



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# File 'lib/hold/sequel/property_mapper/column.rb', line 4

def columns_aliases_and_tables_for_select
  @columns_aliases_and_tables_for_select
end

#table ⇒ Object (readonly)

Returns the value of attribute table.



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# File 'lib/hold/sequel/property_mapper/column.rb', line 4

def table
  @table
end

Instance Method Details

#build_insert_row(entity, table, row, id = nil) ⇒ Object Also known as: build_update_row 



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# File 'lib/hold/sequel/property_mapper/column.rb', line 25

def build_insert_row(entity, table, row, id=nil)
  row[@column_name] = entity[@property_name] if @table == table && entity.has_key?(@property_name)
end

#load_value(row, id = nil, version = nil) ⇒ Object 



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# File 'lib/hold/sequel/property_mapper/column.rb', line 21

def load_value(row, id=nil, version=nil)
  row[@column_alias]
end

#make_filter(value, columns_mapped_to = nil) ⇒ Object

for now ignoring the columns_mapped_to, since Identity mapper is the only one for which this matters at present



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# File 'lib/hold/sequel/property_mapper/column.rb', line 34

def make_filter(value, columns_mapped_to=nil)
  {@column_qualified => value}
end

#make_multi_filter(values, columns_mapped_to = nil) ⇒ Object 



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# File 'lib/hold/sequel/property_mapper/column.rb', line 38

def make_multi_filter(values, columns_mapped_to=nil)
  {@column_qualified => values}
end