ensure schemaKeys are set properly

[satra]

No description provided.

[codecov]

Codecov Report

Merging #68 (a1b0e34) into master (8201cd7) will decrease coverage by 0.12%.
The diff coverage is 86.66%.

@@            Coverage Diff             @@
##           master      #68      +/-   ##
==========================================
- Coverage   96.14%   96.02%   -0.13%     
==========================================
  Files          13       13              
  Lines        1298     1309      +11     
==========================================
+ Hits         1248     1257       +9     
- Misses         50       52       +2     

Flag	Coverage Δ
unittests	96.02% <86.66%> (-0.13%)	⬇️

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Impacted Files	Coverage Δ
dandischema/models.py	93.77% <75.00%> (-0.34%)	⬇️
dandischema/consts.py	100.00% <100.00%> (ø)
dandischema/tests/test_models.py	95.80% <100.00%> (+0.08%)	⬆️

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