fix(event-handler): multi-value query string and validation of scalar parameters #3795
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Issue number: #3732
Summary
Changes
This PR fixes a bug when validating scalar parameters. After the code we've introduced to handle multiple parameters, the code become inconsistent (notice the
Anytype) in that some resolvers return scalar parameters and some others returned a list of parameters.This caused problems when handling validation of scalar parameters. This code fixes that by ensuring the same behaviour in all event handlers, and updating the types accordingly.
User experience
This PR will fix the issue on #3732
Checklist
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