70 lines
2.2 KiB
Ruby
70 lines
2.2 KiB
Ruby
module ActiveRecord # :nodoc:
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class Base # :nodoc:
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class << self
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##
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# This method will add a has_one :page association and a few useful
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# callbacks to the requested model. It expects to have a
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# :owner_class parameter given so that it knows what the owner class
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# name should be. The associated model will automatically be deleted
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# when this model is deleted.
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#
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# The Page will automatically have the title updated from the owner's
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# title field and be saved after a successful save. When a Page errors
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# on validation, the errors are automatically copied into the owner so
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# that the user doesn't even have to know what is going on.
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#
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def has_one_tuxwiki_page(options = {})
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return if self.included_modules.include?(TuxWiki::HasOnePage)
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send :include, TuxWiki::HasOnePage
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# we need a class name for right now. i don't know how to inflect it
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# on my own, yet.
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options[:owner_class] ||= 'Page'
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class_eval do
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has_one :page, :foreign_key => 'owner_id', :dependent => :destroy,
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:conditions => "pages.owner_type = '#{options[:owner_class]}'",
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:include => 'tags'
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before_save :ensure_tuxwiki_page_valid
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after_save :save_tuxwiki_page
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end
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end
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end
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end
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end
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module TuxWiki # :nodoc:
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module HasOnePage # :nodoc:
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protected
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##
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# This model always has a Page associated. Save it before this
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# model to make sure that everything is kosher with the name and
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# whatnot.
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#
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def save_tuxwiki_page
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self.page.save
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end
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##
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# This will let the Page model keep track of names being unique and
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# all. Might be nil, so let the after_save hook create it. Also
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# copies the errors from the page model into the owner model.
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#
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def ensure_tuxwiki_page_valid
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if self.page.nil?
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self.errors.add(:page, "is missing")
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else
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self.page.owner = self
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self.page.title = self.title
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self.page.errors.each do |key, val|
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self.errors.add(key, val)
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end if !self.page.valid?
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end
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return false if self.errors.size > 0
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true
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end
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end
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end
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