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# File 'lib/sequel_dm/extensions/select_fields.rb', line 4
def select_fields(fields)
if fields.empty?
if !model.association_reflections.empty?
eager(model.association_reflections.keys)
else
self
end
else
eager_associations = {}
fields.each do |association, columns|
next if association == :fields
if columns && !columns.is_a?(Array)
columns = get_columns_from_mapper(association)
end
if columns
table_name = model.association_reflections[association][:class].table_name
columns = columns.map { |column| :"#{table_name}__#{column}___#{column}" }
eager_associations[association] = proc{|ds| ds.select(*columns) }
end
end
if fields[:fields].is_a?(Array)
columns = fields[:fields]
else
columns = model.mapper.mappings.keys
end
columns = columns.map { |column| :"#{model.table_name}__#{column}___#{column}" }
eager(eager_associations).select(*columns)
end
end
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