Database.addObject() and changing entity properties - zwcad crashes

[gswifort]

Steps:

1. Open a new document
2. Load the code
3. Execute the DOIT command
4. Undo
5. Try selecting the remaining line, maybe zooming in - ZWCAD crashes.

from pyrx import Db, Ge, command


def create_line(db: Db.Database):
    line = Db.Line(Ge.Point3d(0, 0, 0), Ge.Point3d(100, 100, 0))
    line_id = db.addObject(line)
    return line_id


@command
def doit():
    db = Db.curDb()
    line = Db.Line(create_line(db))
    line.upgradeOpen()
    line.setColorIndex(1)
    line.downgradeOpen()
    db.addToModelspace(line)

I know this is weird code. The goal is to add a BlockReference this way, but I didn't want to make the sample difficult.

[CEXT-Dan]

Hi,
AutoCAD throws an Exception!(eWrongObjectType)
from what I understand, that method is to add non graphical objects to the database, such as reactors, dictionaries, fields, etc.

Since ZwCAD allows this, you could do something like

from pyrx import Db, Ge, command


def create_line(db: Db.Database):
    line = Db.Line(Ge.Point3d(0, 0, 0), Ge.Point3d(100, 100, 0))
    line_id = db.addObject(line)
    return line_id


@command
def doit():
    db = Db.curDb()
    line = Db.Line(create_line(db))
    line.upgradeOpen()
    line.setColorIndex(1)
    line.setOwnerId(db.modelSpaceId()) #<----
    line.downgradeOpen()

It would not be compatible though

[gswifort]

So the get_block_reference function doesn't work in Autocad?

PyRx/pyrx/db/block.py

Line 253 in f82ac23

bref_id = db.addObject(block_ref)

[CEXT-Dan]

Right, it crashes Bricscad as well. I made a note regarding the failing test. I didn't investigate it though, stuck testing wxwidgets 33