all specs pass; refined attachment api

lib/couchrest/core/database.rb

@@ -87,27 +87,28 @@ module CouchRest
     end
     
     # GET an attachment directly from CouchDB
-    def fetch_attachment(docid, name)
-      slug = escape_docid(docid)        
-      name = CGI.escape(name)
-      RestClient.get "#{@uri}/#{slug}/#{name}"
+    def fetch_attachment(doc, name)
+      # slug = escape_docid(docid)        
+      # name = CGI.escape(name)
+
+      uri = uri_for_attachment(doc, name)
+      
+      RestClient.get uri
+      # "#{@uri}/#{slug}/#{name}"
     end
     
     # PUT an attachment directly to CouchDB
     def put_attachment(doc, name, file, options = {})
       docid = escape_docid(doc['_id'])
       name = CGI.escape(name)
-      uri = if doc['_rev']
-        "#{@uri}/#{docid}/#{name}?rev=#{doc['_rev']}"
-      else
-        "#{@uri}/#{docid}/#{name}"
-      end        
+      uri = uri_for_attachment(doc, name)       
       JSON.parse(RestClient.put(uri, file, options))
     end
     
     # DELETE an attachment directly from CouchDB
     def delete_attachment doc, name
       uri = uri_for_attachment(doc, name)
+      # this needs a rev
       JSON.parse(RestClient.delete(uri))
     end
     
@@ -280,9 +281,17 @@ module CouchRest
     private
     
     def uri_for_attachment doc, name
-      docid = escape_docid(doc['_id'])
+      if doc.is_a?(String)
+        puts "CouchRest::Database#fetch_attachment will eventually require a doc as the first argument, not a doc.id"
+        docid = doc
+        rev = nil
+      else
+        docid = doc['_id']
+        rev = doc['_rev']
+      end
+      docid = escape_docid(docid)
       name = CGI.escape(name)
-      rev = "?rev=#{doc['_rev']}" if doc['_rev']
+      rev = "?rev=#{doc['_rev']}" if rev
       "#{@root}/#{docid}/#{name}#{rev}"
     end
     

lib/couchrest/core/document.rb

@@ -30,6 +30,14 @@ module CouchRest
       @@database
     end
     
+    def id
+      self['_id']
+    end
+    
+    def rev
+      self['_rev']
+    end
+    
     # copies the document to a new id. If the destination id currently exists, a rev must be provided.
     # <tt>dest</tt> can take one of two forms if overwriting: "id_to_overwrite?rev=revision" or the actual doc
     # hash with a '_rev' key
@@ -67,6 +75,7 @@ module CouchRest
     
     # saves an attachment directly to couchdb
     def put_attachment(name, file, options={})
+      raise ArgumentError, "doc must be saved" unless self.rev
       raise ArgumentError, "doc.database required to put_attachment" unless database
       result = database.put_attachment(self, name, file, options)
       self['_rev'] = result['rev']
@@ -75,6 +84,7 @@ module CouchRest
     
     # returns an attachment's data
     def fetch_attachment(name)
+      raise ArgumentError, "doc must be saved" unless self.rev
       raise ArgumentError, "doc.database required to put_attachment" unless database
       database.fetch_attachment(self, name)
     end