asp.net mvc 3 - "Does not contain definition for" error when using junction table created using .toTable() method in dbContext -


i'm not sure i'm doing wrong here. table "class1class2" not being recognised.(see code below). want able use junction table

context

 public class context: dbcontext {   protected override void onmodelcreating(dbmodelbuilder modelbuilder)   {   modelbuilder.entity<class1>()   .hasmany(c => c.listofclass2).withmany(i => i.listofclass1)   .map(t => t.mapleftkey("class1id")   .maprightkey("class2id")   .totable("class1class2"));   } }

implementation:

context db = new context(); var r= db.class1class2;

class1class2 in implementation code not recognised

yes not recognized because doesn't exist. when map many-to-many relation way there no class used junction table. handled transparently through navigation properties listofclass2 , listofclass1.

if want have access junction table (which useful if junction table contains additional data - not foreign keys) must create class , map 2 one-to-many relations new class instead.


Comments

Post a Comment

Popular posts from this blog

linux - xterm copying to CLIPBOARD using copy-selection causes automatic updating of CLIPBOARD upon mouse selection -

i've tried various ways coerce xterm (versions 285 , 292) copy selection clipboard clipboard whenever press ctrl-shift-c. promising way far has been, in ~/.xresources, put this: xterm*vt100.translations: #override \ ctrl shift <keypress> c: copy-selection(clipboard) \n\ ctrl shift <keypress> v: insert-selection(clipboard) ctrl-shift-v works perfectly, copying has nuance... if restart xterm, highlighting text puts things in primary clipboard; expected, proper, default behavior. if hit ctrl-shift-c, copies current selection clipboard clipboard. the bug, however, if highlight text after first time pressed ctrl-shift-c, you'll see highlighting copies both primary and clipboard. cannot figure out how stop xterm updating clipboard upon selection... , doesn't make sense me in first place. i said, @ specific point in time, copy selection clipboard... yet starts updating automatically upon selection after doing once... anyone have workaround...
Read more

c++ - qgraphicsview horizontal scrolling always has a vertical delta -

Image
i've subclassed qgraphicsview custom canvas used in cad application. i've reimplemented qgraphicsview::wheelevent check keyboard modifiers control key and, if control key pressed, zoom. i'm trying implement horizontal scroll when user holds shift , uses wheel. the problem i'm having horizontal scrolling always scrolls 0.279. not huge problem, hugely annoying , points else being wrong. so, here questions: is right way implement horizontal scrolling? if not, is? how eliminate delta of 0.279? thanks in advance. code , sample output below void myview::zoom(int delta) { double factor = pow(1.2, delta/abs(delta)); this->scale(factor, factor); } void myview::scrollhorizontal(int level) { qpointf center = maptoscene(viewport()->rect().center()); qdebug() << "center: " << center.x() << ", " << center.y(); centeron(qpointf(center.x() - level, center.y())); } void myview::wheelevent(qwheeleve...
Read more