Plone 5.0.x creating portlets

Hi there,

i'd like to ask, if anybody know a good tutorial for creating portlets for Plone 5.0.x? I'm trying to create a portlet with official plone documentation (https://docs.plone.org/develop/plone/functionality/portlets.html) but i had field...

Does anybody have or know a good tutorial, how to make Portlet from scratch?

After succesfull running bin/buildout -d develop.cfg plone dont work, i see only 502 Bad Gateway error. This happend, when i try do add a portlet.

For sample code, maybe try this https://github.com/collective/collective.collectionfilter or look in the collective for other packages that include portlets.

Please post your develop.cfg here, but if your portlet code has a problem, that is probably what is causing Plone not to start correctly.