Adding support for start and end key swapping with descending

This commit is contained in:
Sam Lown 2011-04-15 19:24:06 +02:00
parent cacc320235
commit 2eed3581af
3 changed files with 30 additions and 3 deletions

View file

@ -2,6 +2,7 @@
* Minor enhancements:
* Adding "couchrest-hash" to Design Docs with aim to improve view update handling.
* Using #descending on View object will automatically swap startkey with endkey.
== 1.1.0.beta2

View file

@ -239,11 +239,19 @@ module CouchRest
end
# The results should be provided in descending order.
# The results should be provided in descending order. If the startkey or
# endkey query options have already been seen set, calling this method
# will automatically swap the options around. If you don't want this,
# simply set descending before any other option.
#
# Descending is false by default, this method will enable it and cannot
# be undone.
# Descending is false by default, and this method cannot
# be undone once used, it has no inverse option.
def descending
if query[:startkey] || query[:endkey]
query[:startkey], query[:endkey] = query[:endkey], query[:startkey]
elsif query[:startkey_docid] || query[:endkey_docid]
query[:startkey_docid], query[:endkey_docid] = query[:endkey_docid], query[:startkey_docid]
end
update_query(:descending => true)
end

View file

@ -386,6 +386,24 @@ describe "Design View" do
@obj.should_receive(:update_query).with({:descending => true})
@obj.descending
end
it "should reverse start and end keys if given" do
@obj = @obj.startkey('a').endkey('z')
@obj = @obj.descending
@obj.query[:endkey].should eql('a')
@obj.query[:startkey].should eql('z')
end
it "should reverse even if start or end nil" do
@obj = @obj.startkey('a')
@obj = @obj.descending
@obj.query[:endkey].should eql('a')
@obj.query[:startkey].should be_nil
end
it "should reverse start_doc and end_doc keys if given" do
@obj = @obj.startkey_doc('a').endkey_doc('z')
@obj = @obj.descending
@obj.query[:endkey_docid].should eql('a')
@obj.query[:startkey_docid].should eql('z')
end
end
describe "#limit" do