Lagom Cassandra read before update -


this specific lagom framework. during update not have complete data, have few alternate tables needs updated well, how do read main table, have keys perform update on alternate tables.

please check official docs on one:

https://www.lagomframework.com/documentation/1.3.x/java/readsidecassandra.html


Comments

Post a Comment

Popular posts from this blog

javascript - Knockout pushing observable and computed data to an observable array -

i trying push multiple data (firstname , lastname), along when compute firstname , lastname , try push data in same array thrown error. below code. viewmodel: var viewmodel = function () { var self = this; self.gameofthrones = ko.observablearray ([ {firstname: 'jon', lastname: 'snow'}, {firstname: 'robb', lastname: 'stark'} ]); self.firstname = ko.observable(''); self.lastname = ko.observable(''); (var i=0; i<self.gameofthrones().length; i++) { self.gameofthrones()[i].fullname = ko.computed (function () { return self.gameofthrones()[i].firstname+" "+self.gameofthrones()[i].lastname; }) }; $('#classic').click( function() { self.gameofthrones.push( {firstname: $('#fn').val(), lastname: $('#pr').val()} ); }); } ko.applybindings(new viewmodel()); html view: <form class="" action="index.html" method="post"...
Read more

'hasOwnProperty' in javascript -

i use obj.hasownproperty judge whether object has property, when replaced obj[prop] !== undefined , not normal implementation, ask, why behind method can not use it? object.hasownproperty(prop); object[prop] !== undefined; obj[prop] !== undefined wrong 2 reasons: you can explicitly set property undefined , obj[prop] = undefined; . obj.hasownproperty(prop) return true in case. obj[prop] follow prototype chain, return property that's inherited. obj.hasownproperty(prop) returns true if property exists directly in object, returns false inherited properties.
Read more

c# - Update a combobox from a presenter (MVP) -

i using mvp in project, new in mvp. have 2 comboboxes. when select option in combobox, combobox should filled new data. this action in presenter. view 'view1' in presenter, , introduced combobox1 , combobox2 properties in 'view1', because need 'datasource', 'displaymember', 'valuemember' , 'refresh()' in method below. but, when using pattern, enough send property like public string combobox2 { { return combobox1.selectedvalue.tosstring(); } } into presenter not whole combobox. how can solve problem? public void onselectedindexchangedcombobox1() { if (view1.combobox1.selectedindex == -1) { return; } datatable dt = tools.getdatatable("a path"); var query = (from o in dt.asenumerable() o.field<string>("afield") == farmerview.combobox1.selectedvalue.tostring() orderby o.field<string>("anotherfield") select...
Read more