90 lines
No EOL
2.4 KiB
Ruby
90 lines
No EOL
2.4 KiB
Ruby
require 'digest/md5'
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module CouchRest
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module Mixins
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module DesignDoc
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def self.included(base)
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base.extend(ClassMethods)
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end
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module ClassMethods
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attr_accessor :design_doc, :design_doc_slug_cache, :design_doc_fresh
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def design_doc
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@design_doc ||= Design.new(default_design_doc)
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end
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def design_doc_id
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"_design/#{design_doc_slug}"
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end
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def design_doc_slug
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return design_doc_slug_cache if (design_doc_slug_cache && design_doc_fresh)
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funcs = []
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design_doc['views'].each do |name, view|
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funcs << "#{name}/#{view['map']}#{view['reduce']}"
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end
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md5 = Digest::MD5.hexdigest(funcs.sort.join(''))
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self.design_doc_slug_cache = "#{self.to_s}-#{md5}"
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end
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def default_design_doc
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{
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"language" => "javascript",
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"views" => {
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'all' => {
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'map' => "function(doc) {
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if (doc['couchrest-type'] == '#{self.to_s}') {
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emit(null,null);
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}
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}"
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}
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}
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}
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end
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def refresh_design_doc
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design_doc['_id'] = design_doc_id
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design_doc.delete('_rev')
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#design_doc.database = nil
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self.design_doc_fresh = true
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end
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# Save the design doc onto the default database, and update the
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# design_doc attribute
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def save_design_doc
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refresh_design_doc unless design_doc_fresh
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self.design_doc = update_design_doc(design_doc)
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end
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# Save the design doc onto a target database in a thread-safe way,
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# not modifying the model's design_doc
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def save_design_doc_on(db)
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update_design_doc(Design.new(design_doc), db)
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end
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private
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# Writes out a design_doc to a given database, returning the
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# updated design doc
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def update_design_doc(design_doc, db = database)
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saved = db.get(design_doc['_id']) rescue nil
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if saved
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design_doc['views'].each do |name, view|
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saved['views'][name] = view
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end
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db.save_doc(saved)
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saved
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else
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design_doc.database = db
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design_doc.save
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design_doc
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end
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end
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end # module ClassMethods
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end
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end
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end |