go-couchbase client Update function -


i using update function of go-couchbase

//defining function first , passing argument myfunc := func(current []byte)(updated []byte, err error) {return updated, err } myb.update("key123", 1, myfunc)

however, when run update function of bucket. checked couch database. document key of "key123" disappeared. seems update not update value delete it. happened? doing not correct?

func (*bucket) update

func (b *bucket) update(k string, exp int, callback updatefunc) error

update performs safe update of document, avoiding conflicts using cas.

the callback function invoked current raw document contents (or nil if document doesn't exist); should return updated raw contents (or nil delete.) if decides not change can return updatecancel error.

if writer modifies document between , set, callback invoked again newer value.

your updatefunc:

myfunc := func(current []byte)(updated []byte, err error) {return updated, err }

you not set updated []byte value before return it. therefore, has 0 value nil, request delete: "the callback function should return updated raw contents (or nil delete.)"


Comments

Post a Comment

Popular posts from this blog

java - How to specify maven bin in eclipse maven plugin? -

i have eclipse maven plugin coming on centos. how can execute maven command on linx like: mvn clean package [abigail@localhost ~]$ mvn bash: mvn: command not found how should specify path executable of maven plugin in eclipse? or have install maven seperately？ thanks. eclipse (m2e) have bundled central parts of maven inside eclipse plugin, why not detected, , not usable. investigation find correct way bootstrap it, have create launcher file manually. if want run maven outside of eclipse, far better off standalone version of maven. mvn command bootstrap maven runtime system correctly, , secondly, able use advice concerning use of maven. maven binaries quite stable, wouldn't need upgrade upgrade eclipse. you can subsequently switch eclipse use external installation if prefer.
Read more

Error while updating a record in APEX screen -

while updating record using mru failing below error. 1 error has occurred current version of data in database has changed since user initiated update process. current row version identifier = "c5f3645b026aa5646c00dc7b631c4d19" application row version identifier = "6a9323b62f641015fa4601421dfb03de" (row 1) this strange because not see change in data @ backend. any highly appreciated. thanks. aj
Read more

javascript - Jquery show_hide, what to add in order to make the page scroll to the bottom of the hidden field once button is clicked -

i have button on website when clicked, reveals map. button can seen when page first loads up, when clicked, section holding map slides open , goes out of screen since page loads @ top (normal). want page scroll down bottom of div select when button pushed, if map out of screen. if page scrolled down, , clicks show map button, don't want page jump bottom of map. i tried figure out myself, no luck. seasoned jquery coders able give me guidance? many thanks! map = mapdiv.gmap3("get"); infobox = new infobox({ pixeloffset: new google.maps.size(-220, -310), closeboxurl: '', enableeventpropagation: true }); mapdiv.delegate('.infobox .close','click',function () { infobox.close(); }); jquery(".slidingdiv").hide(); jquery(".show_hide").show(); jquery('.show_hide').click(function(){ lastcenter=map.getcenter(); jquery(".slidingdiv...
Read more