_createButton

Becomes a Create button for the received Model -- Function
Thing Type -> Thing Type._createButton (label, classes) -> Value has not been set
Receives -- Thing Type
The Model to instantiate : Defining Context (optional) : A Property -- if given, that Property on the new Instance will point back to here
label
The text to show on the button
classes (optional)
Display classes to apply to the button. If not specified, btn-default will be used.
Produces
The actual button on the page
This displays a button, with the given label, if the user is allowed to create Instances of that Model.
For example, say we have Models named Bookcase and Book. Book has a My Bookcase property, that points to the case it is on. I want a button to show on Bookcase that creates a new Book on that case, and I want it to show using the "primary" style (green). I would add a button to Bookcase, that looks like this:
[[Book -> My Bookcase._createButton(""Add a Book to this case"", classes=""btn-primary"")]]
Because I give My Bookcase as the Defining Context, Querki uses that property to point from the new Book back to the Bookcase that created it.