81 lines
2.3 KiB
Ruby
81 lines
2.3 KiB
Ruby
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module ActiveRecord
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module Associations
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class HasOneAssociation < BelongsToAssociation #:nodoc:
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def initialize(owner, reflection)
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super
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construct_sql
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end
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def create(attributes = {}, replace_existing = true)
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record = build(attributes, replace_existing)
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record.save
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record
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end
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def build(attributes = {}, replace_existing = true)
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record = @reflection.klass.new(attributes)
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if replace_existing
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replace(record, true)
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else
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record[@reflection.primary_key_name] = @owner.id unless @owner.new_record?
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self.target = record
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end
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record
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end
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def replace(obj, dont_save = false)
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load_target
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unless @target.nil?
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if dependent? && !dont_save && @target != obj
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@target.destroy unless @target.new_record?
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@owner.clear_association_cache
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else
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@target[@reflection.primary_key_name] = nil
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@target.save unless @owner.new_record? || @target.new_record?
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end
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end
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if obj.nil?
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@target = nil
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else
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raise_on_type_mismatch(obj)
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set_belongs_to_association_for(obj)
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@target = (AssociationProxy === obj ? obj.target : obj)
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end
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@loaded = true
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unless @owner.new_record? or obj.nil? or dont_save
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return (obj.save ? self : false)
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else
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return (obj.nil? ? nil : self)
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end
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end
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private
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def find_target
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@reflection.klass.find(:first,
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:conditions => @finder_sql,
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:order => @reflection.options[:order],
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:include => @reflection.options[:include]
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)
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end
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def construct_sql
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case
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when @reflection.options[:as]
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@finder_sql =
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"#{@reflection.klass.table_name}.#{@reflection.options[:as]}_id = #{@owner.quoted_id} AND " +
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"#{@reflection.klass.table_name}.#{@reflection.options[:as]}_type = #{@owner.class.quote @owner.class.base_class.name.to_s}"
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else
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@finder_sql = "#{@reflection.table_name}.#{@reflection.primary_key_name} = #{@owner.quoted_id}"
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end
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@finder_sql << " AND (#{conditions})" if conditions
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end
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end
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end
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end
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