python - NDB many-to-many KeyProperty kind reference not working -
After
I am trying to connect different entities with one another with KeyProperties in App Engine like this: But I'm saying that "ModelB" is undefined in this structure to get an error. Obviously, whatever is referred to below is not recognized. So if I get rid of some kind of work in Model A and Model B, then in Model C they are fine and everything runs. I need to refer them to circuit form, and it seems like I should work. Am I doing something wrong? In such cases, you can pass as the form of a string:
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