support $ref in response

[koxudaxi]

This supports $ref in response

Related Issues

https://github.com/koxudaxi/fastapi-code-generator/pull/19/files

[codecov-commenter]

Codecov Report

❗ No coverage uploaded for pull request base (master@913a41f). Click here to learn what that means.
The diff coverage is n/a.

@@            Coverage Diff            @@
##             master      #29   +/-   ##
=========================================
  Coverage          ?   94.28%           
=========================================
  Files             ?        2           
  Lines             ?      280           
  Branches          ?        0           
=========================================
  Hits              ?      264           
  Misses            ?       16           
  Partials          ?        0           

Flag	Coverage Δ
#unittests	94.28% <0.00%> (?)

Flags with carried forward coverage won't be shown. Click here to find out more.

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update 913a41f...6704e4c. Read the comment docs.