Mongodb allows you to query a specific column in a relational database.

Recently, the find () method in tornadomongodbansiblemongodb is awesome. You can upload all the tables in the set. At first I wrote classModule_actionHandler (tornado. web. requestHandler): defget (self, * args, ** kwargs): collself. application. db. waitfishhostscol

Recently, there was a find () method in tornado \ mongodb \ ansible mongodb, which was awesome. You can upload all the tables in the set. At first I wrote class Module_actionHandler (tornado. web. requestHandler): def get (self, * args, ** kwargs): coll = self. application. db. waitfish hosts = col

Recently in tornado \ mongodb \ ansible

The find () method in mongodb is awesome. You can upload all the tables in the set.

class Module_actionHandler(tornado.web.RequestHandler):    def get(self, *args, **kwargs):        coll = self.application.db.waitfish        hosts = coll.find({}, {'hostname':1,"_id":0})        modulenames = ['ping', 'setup', 'copy']        self.render(            "module_action.html",            hosts = hosts,            modulenames = modulenames,        )

Then in the template:

                {% for host in hosts %}                {{ host['hostname'] }}                {% end %}

Later I thought about the find () method to find all the tables, which is too much damage ..

So I went to see du Niang again, basically listing a lot of query commands and a lot of methods.

Finally, I chose this one:

Class Module_actionHandler (tornado. web. requestHandler): def get (self, * args, ** kwargs): coll = self. application. db. waitfish hosts = coll. find ({},{ 'hostname': 1, "_ id": 0}) # To explain, Here hostname: 1 indicates that the hostname column is returned, because the _ id column is returned every time, 0 is disabled. The template is also modulenames = ['ping', 'setup', 'copy'] self. render ("module_action.html", hosts = hosts, modulenames = modulenames ,)