on the road toward design docs
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Chris Anderson
parent
04e818c154
commit
0769c2690f
10 changed files with 454 additions and 189 deletions
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@ -87,7 +87,7 @@ module CouchRest
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class_inheritable_accessor :casts
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class_inheritable_accessor :default_obj
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class_inheritable_accessor :class_database
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class_inheritable_accessor :generated_design_doc
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class_inheritable_accessor :design_doc
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class_inheritable_accessor :design_doc_slug_cache
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class_inheritable_accessor :design_doc_fresh
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@ -111,15 +111,15 @@ module CouchRest
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# Load all documents that have the "couchrest-type" field equal to the
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# name of the current class. Take thes the standard set of
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# CouchRest::Database#view options.
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def all opts = {}
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self.generated_design_doc ||= default_design_doc
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unless design_doc_fresh
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refresh_design_doc
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end
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view_name = "#{design_doc_slug}/all"
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raw = opts.delete(:raw)
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fetch_view_with_docs(view_name, opts, raw)
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end
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# def all opts = {}
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# self.generated_design_doc ||= default_design_doc
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# unless design_doc_fresh
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# refresh_design_doc
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# end
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# view_name = "#{design_doc_slug}/all"
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# raw = opts.delete(:raw)
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# fetch_view_with_docs(view_name, opts, raw)
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# end
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# Cast a field as another class. The class must be happy to have the
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# field's primitive type as the argument to it's constucture. Classes
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@ -263,46 +263,54 @@ module CouchRest
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# To understand the capabilities of this view system more compeletly,
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# it is recommended that you read the RSpec file at
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# <tt>spec/core/model_spec.rb</tt>.
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def view_by *keys
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opts = keys.pop if keys.last.is_a?(Hash)
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opts ||= {}
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type = self.to_s
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method_name = "by_#{keys.join('_and_')}"
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self.generated_design_doc ||= default_design_doc
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ducktype = opts.delete(:ducktype)
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if opts[:map]
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view = {}
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view['map'] = opts.delete(:map)
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if opts[:reduce]
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view['reduce'] = opts.delete(:reduce)
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opts[:reduce] = false
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end
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generated_design_doc['views'][method_name] = view
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else
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doc_keys = keys.collect{|k|"doc['#{k}']"}
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key_protection = doc_keys.join(' && ')
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key_emit = doc_keys.length == 1 ? "#{doc_keys.first}" : "[#{doc_keys.join(', ')}]"
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map_function = <<-JAVASCRIPT
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function(doc) {
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if (#{!ducktype ? "doc['couchrest-type'] == '#{type}' && " : ""}#{key_protection}) {
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emit(#{key_emit}, null);
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}
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}
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JAVASCRIPT
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generated_design_doc['views'][method_name] = {
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'map' => map_function
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}
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end
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generated_design_doc['views'][method_name]['couchrest-defaults'] = opts
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self.design_doc_fresh = false
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method_name
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def view_by *keys
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self.design_doc ||= Design.new(default_design_doc)
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self.design_doc.view_by(*keys)
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end
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# def view_by *keys
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# opts = keys.pop if keys.last.is_a?(Hash)
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# opts ||= {}
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#
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#
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# type = self.to_s
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#
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# method_name = "by_#{keys.join('_and_')}"
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# self.generated_design_doc ||= default_design_doc
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# ducktype = opts.delete(:ducktype)
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# if opts[:map]
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# view = {}
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# view['map'] = opts.delete(:map)
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# if opts[:reduce]
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# view['reduce'] = opts.delete(:reduce)
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# opts[:reduce] = false
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# end
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# generated_design_doc['views'][method_name] = view
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# else
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# doc_keys = keys.collect{|k|"doc['#{k}']"}
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# key_protection = doc_keys.join(' && ')
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# key_emit = doc_keys.length == 1 ? "#{doc_keys.first}" : "[#{doc_keys.join(', ')}]"
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# map_function = <<-JAVASCRIPT
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# function(doc) {
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# if (#{!ducktype ? "doc['couchrest-type'] == '#{type}' && " : ""}#{key_protection}) {
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# emit(#{key_emit}, null);
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# }
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# }
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# JAVASCRIPT
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# generated_design_doc['views'][method_name] = {
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# 'map' => map_function
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# }
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# end
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# generated_design_doc['views'][method_name]['couchrest-defaults'] = opts
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# self.design_doc_fresh = false
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# method_name
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# end
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def method_missing m, *args
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if opts = has_view?(m)
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if has_view?(m)
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query = args.shift || {}
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view(m, opts.merge(query), *args)
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view(m, query, *args)
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else
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super
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end
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@ -311,14 +319,14 @@ module CouchRest
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# returns stored defaults if the there is a view named this in the design doc
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def has_view?(view)
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view = view.to_s
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generated_design_doc['views'][view] &&
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generated_design_doc['views'][view]["couchrest-defaults"]
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design_doc['views'][view]
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end
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# Fetch the generated design doc. Could raise an error if the generated views have not been queried yet.
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def design_doc
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database.get("_design/#{design_doc_slug}")
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end
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# # Fetch the generated design doc. Could raise an error if the generated
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# # views have not been queried yet.
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# def design_doc
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# database.get("_design/#{design_doc_slug}")
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# end
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# Dispatches to any named view.
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def view name, query={}, &block
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@ -327,8 +335,7 @@ module CouchRest
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end
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query[:raw] = true if query[:reduce]
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raw = query.delete(:raw)
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view_name = "#{design_doc_slug}/#{name}"
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fetch_view_with_docs(view_name, query, raw, &block)
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fetch_view_with_docs(name, query, raw, &block)
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end
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private
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@ -352,7 +359,7 @@ module CouchRest
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def fetch_view view_name, opts, &block
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retryable = true
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begin
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database.view(view_name, opts, &block)
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design_doc.view(view_name, opts, &block)
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# the design doc could have been deleted by a rouge process
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rescue RestClient::ResourceNotFound => e
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if retryable
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@ -368,7 +375,7 @@ module CouchRest
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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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generated_design_doc['views'].each do |name, view|
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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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@ -390,20 +397,21 @@ module CouchRest
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}
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end
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def refresh_design_doc
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did = "_design/#{design_doc_slug}"
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saved = database.get(did) rescue nil
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if saved
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generated_design_doc['views'].each do |name, view|
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saved['views'][name] = view
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end
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database.save(saved)
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else
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generated_design_doc['_id'] = did
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database.save(generated_design_doc)
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end
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self.design_doc_fresh = true
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end
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# def refresh_design_doc
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# did = "_design/#{design_doc_slug}"
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# saved = database.get(did) 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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# database.save(saved)
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# else
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# design_doc['_id'] = did
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# design_doc.database = database
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# design_doc.save
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# end
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# self.design_doc_fresh = true
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# end
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end # class << self
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@ -412,16 +420,6 @@ module CouchRest
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self.class.database
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end
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# alias for self['_id']
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def id
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self['_id']
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end
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# alias for self['_rev']
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def rev
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self['_rev']
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end
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# Takes a hash as argument, and applies the values by using writer methods
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# for each key. Raises a NoMethodError if the corresponding methods are
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# missing. In case of error, no attributes are changed.
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@ -435,59 +433,8 @@ module CouchRest
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save
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end
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# returns true if the document has never been saved
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def new_record?
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!rev
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end
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# Saves the document to the db using create or update. Also runs the :save
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# callbacks. Sets the <tt>_id</tt> and <tt>_rev</tt> fields based on
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# CouchDB's response.
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def save
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if new_record?
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create
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else
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update
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end
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end
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# Deletes the document from the database. Runs the :delete callbacks.
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# Removes the <tt>_id</tt> and <tt>_rev</tt> fields, preparing the
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# document to be saved to a new <tt>_id</tt>.
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def destroy
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result = database.delete self
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if result['ok']
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self['_rev'] = nil
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self['_id'] = nil
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end
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result['ok']
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end
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protected
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# Saves a document for the first time, after running the before(:create)
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# callbacks, and applying the unique_id.
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def create
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set_unique_id if respond_to?(:set_unique_id) # hack
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save_doc
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end
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# Saves the document and runs the :update callbacks.
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def update
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save_doc
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end
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private
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def save_doc
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result = database.save self
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if result['ok']
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self['_id'] = result['id']
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self['_rev'] = result['rev']
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end
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result['ok']
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end
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def apply_defaults
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if self.class.default
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self.class.default.each do |k,v|
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