casrn is not a required field on substance

Chemical-Curation / chemcurator_django

Backend services for chemical curation

https://api.chemreg.epa.gov

MIT License

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Closed cmgrulke closed 3 years ago

cmgrulke commented 3 years ago

As a curator I want the casrn to not be required for the creation of a substance So that I can register substances that do not have casrns

Acceptance Criteria: If a substance is posted or patched without a casrn, it should be successfully created/updated

Test: