Rebased

* 'master' of git://github.com/jchris/couchrest:
  all specs pass; refined attachment api
  add mattetti's 5aebd53a93
  fix rebase end balance
  Started on the ExtendedDocument class with features moved to mixins.
  Started on the ExtendedDocument class with features moved to mixins.
  updated readme file
  Started the refactoring work on couchrest.
  added some monkey patches to improve the http connection speed. (by keeping the http connection open)
  slight change of API, CR::Document now uses <action>_doc instead of <action>, also added #create! and #recreate! to Document instances
  Added attachment methods to CouchRest::Document: #put_attachment, #fetch_attachment and #delete_attachment. Note you can overwrite exisitng attachments with #put_attachment.
  - Added Database#delete_attachment, for removing them directly
  documentation for Document#copy and #move, copied from Database
  database replication methods, no conflict resolution provided

lib/couchrest/core/database.rb

@@ -87,23 +87,29 @@ 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}"
+      uri = uri_for_attachment(doc, name)       
+      JSON.parse(RestClient.put(uri, file, options))
     end
     
-      JSON.parse(RestClient.put(uri, file, options))
+    # 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
     
     # Save a document to CouchDB. This will use the <tt>_id</tt> field from
@@ -254,6 +260,18 @@ module CouchRest
       create!
     end
     
+    # Replicates via "pulling" from another database to this database. Makes no attempt to deal with conflicts.
+    def replicate_from other_db
+      raise ArgumentError, "must provide a CouchReset::Database" unless other_db.kind_of?(CouchRest::Database)
+      CouchRest.post "#{@host}/_replicate", :source => other_db.root, :target => name
+    end
+    
+    # Replicates via "pushing" to another database. Makes no attempt to deal with conflicts.
+    def replicate_to other_db
+      raise ArgumentError, "must provide a CouchReset::Database" unless other_db.kind_of?(CouchRest::Database)
+      CouchRest.post "#{@host}/_replicate", :target => other_db.root, :source => name
+    end
+    
     # DELETE the database itself. This is not undoable and could be rather
     # catastrophic. Use with care!
     def delete!
@@ -262,7 +280,22 @@ module CouchRest
 
     private
     
-    def escape_docid(id)    
+    def uri_for_attachment doc, name
+      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 rev
+      "#{@root}/#{docid}/#{name}#{rev}"
+    end
+    
+    def escape_docid id      
       /^_design\/(.*)/ =~ id ? "_design/#{CGI.escape($1)}" : CGI.escape(id) 
     end
 

lib/couchrest/core/document.rb

@@ -30,6 +30,32 @@ 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
+    def copy(dest)
+      raise ArgumentError, "doc.database required to copy" unless database
+      result = database.copy_doc(self, dest)
+      result['ok']
+    end
+    
+    # moves 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
+    def move(dest)
+      raise ArgumentError, "doc.database required to copy" unless database
+      result = database.move_doc(self, dest)
+      result['ok']
+    end
+    
     # Returns the CouchDB uri for the document
     def uri(append_rev = false)
       return nil if new_document?
@@ -47,6 +73,29 @@ module CouchRest
       @database || self.class.database
     end
     
+    # 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']
+      result['ok']
+    end
+    
+    # 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
+    
+    # deletes an attachment directly from couchdb
+    def delete_attachment(name)
+      raise ArgumentError, "doc.database required to delete_attachment" unless database
+      result = database.delete_attachment(self, name)
+      self['_rev'] = result['rev']
+      result['ok']
+    end
   end
   
 end

spec/couchrest/core/database_spec.rb

@@ -231,6 +231,30 @@ describe CouchRest::Database do
     
   end
   
+  describe "fetch_attachment" do
+    before do
+      @attach = "<html><head><title>My Doc</title></head><body><p>Has words.</p></body></html>"
+      @doc = {
+        "_id" => "mydocwithattachment",
+        "field" => ["some value"],
+        "_attachments" => {
+          "test.html" => {
+            "type" => "text/html",
+            "data" => @attach
+          }
+        }
+      }
+      @db.save(@doc)
+    end
+    
+    it "should get the attachment with the doc's _id" do
+      @db.fetch_attachment("mydocwithattachment", "test.html").should == @attach
+    end
+    it "should get the attachment with the doc itself" do
+      @db.fetch_attachment(@db.get('mydocwithattachment'), 'test.html').should == @attach
+    end
+  end
+  
   describe "PUT attachment from file" do
     before(:each) do
       filename = FIXTURE_PATH + '/attachments/couchdb.png'
@@ -331,6 +355,27 @@ describe CouchRest::Database do
     end
   end
   
+  describe "DELETE an attachment directly from the database" do
+    before(:each) do
+      doc = {
+        '_id' => 'mydocwithattachment',
+        '_attachments' => {
+          'test.html' => {
+            'type' => 'text/html',
+            'data' => "<html><head><title>My Doc</title></head><body><p>Has words.</p></body></html>"
+          }
+        }
+      }
+      @db.save(doc)
+      @doc = @db.get('mydocwithattachment')
+    end
+    it "should delete the attachment" do
+      lambda { @db.fetch_attachment('mydocwithattachment','test.html') }.should_not raise_error
+      @db.delete_attachment(@doc, "test.html")
+      lambda { @db.fetch_attachment('mydocwithattachment','test.html') }.should raise_error(RestClient::ResourceNotFound)
+    end
+  end
+
   describe "POST document with attachment (with funky name)" do
     before(:each) do
       @attach = "<html><head><title>My Funky Doc</title></head><body><p>Has words.</p></body></html>"
@@ -625,6 +670,37 @@ describe CouchRest::Database do
     end
   end
   
+  describe "replicating a database" do
+    before do
+      @db.save({'_id' => 'test_doc', 'some-value' => 'foo'})
+      @other_db = @cr.database 'couchrest-test-replication'
+      @other_db.delete! rescue nil
+      @other_db = @cr.create_db 'couchrest-test-replication'
+    end
+
+    describe "via pulling" do
+      before do
+        @other_db.replicate_from @db
+      end
+      
+      it "contains the document from the original database" do
+        doc = @other_db.get('test_doc')
+        doc['some-value'].should == 'foo'
+      end
+    end
+    
+    describe "via pushing" do
+      before do
+        @db.replicate_to @other_db
+      end
+      
+      it "copies the document to the other database" do
+        doc = @other_db.get('test_doc')
+        doc['some-value'].should == 'foo'
+      end
+    end
+  end
+
   describe "creating a database" do
     before(:each) do
       @db = @cr.database('couchrest-test-db_to_create')

spec/couchrest/core/document_spec.rb

@@ -142,6 +142,10 @@ describe CouchRest::Document do
     end
   end
 
+  describe  "bulk saving" do
+    before :all do
+      @db = reset_test_db!
+    end
 
   describe "destroying a document from a db using bulk save" do
     before(:all) do
@@ -243,4 +247,68 @@ describe CouchRest::Document do
       end
     end
   end
+
+describe "dealing with attachments" do
+  before do
+    @db = reset_test_db!
+    @attach = "<html><head><title>My Doc</title></head><body><p>Has words.</p></body></html>"
+    response = @db.save({'key' => 'value'})
+    @doc = @db.get(response['id'])
+  end
+  
+  def append_attachment(name='test.html', attach=@attach)
+    @doc['_attachments'] ||= {}
+    @doc['_attachments'][name] = {
+      'type' => 'text/html',
+      'data' => attach
+    }
+    @doc.save
+    @rev = @doc['_rev']
+  end
+  
+  describe "PUTing an attachment directly to the doc" do
+    before do
+      @doc.put_attachment('test.html', @attach)
+    end
+    
+    it "is there" do
+      @db.fetch_attachment(@doc, 'test.html').should == @attach
+    end
+    
+    it "updates the revision" do
+      @doc['_rev'].should_not == @rev
+    end
+    
+    it "updates attachments" do
+      @attach2 = "<html><head><title>My Doc</title></head><body><p>Is Different.</p></body></html>"
+      @doc.put_attachment('test.html', @attach2)
+      @db.fetch_attachment(@doc, 'test.html').should == @attach2
+    end
+  end
+  
+  describe "fetching an attachment from a doc directly" do
+    before do
+      append_attachment
+    end
+    
+    it "pulls the attachment" do
+      @doc.fetch_attachment('test.html').should == @attach
+    end
+  end
+  
+  describe "deleting an attachment from a doc directly" do
+    before do
+      append_attachment
+      @doc.delete_attachment('test.html')
+    end
+    
+    it "removes it" do
+      lambda { @db.fetch_attachment(@doc, 'test.html').should }.should raise_error(RestClient::ResourceNotFound)
+    end
+    
+    it "updates the revision" do
+      @doc['_rev'].should_not == @rev
+    end
+  end
+  
 end