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How do you deal with for example with this: New column C C = A + B Drop A, B If I just specify the desired state I get data loss...

• DangitBobby 3y ago
  Good migration systems like Django's will have escape hatches.
  • ChymeraXYZ 3y ago
    Yes but then it's no longer declarative, is it?
    • DangitBobby 3y ago
      I don't mind.
    • danaris 3y ago
      Is absolute purity a requirement?