一些小优化

[liangliangyy]

No description provided.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 85.67%. Comparing base (ca320b0) to head (5fd4614).
⚠️ Report is 8 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #785      +/-   ##
==========================================
- Coverage   85.84%   85.67%   -0.18%     
==========================================
  Files          72       72              
  Lines        3003     3008       +5     
==========================================
- Hits         2578     2577       -1     
- Misses        425      431       +6     

Flag	Coverage Δ
unittests	85.67% <100.00%> (-0.18%)	⬇️

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

Files with missing lines	Coverage Δ
blog/templatetags/blog_tags.py	84.97% <100.00%> (-2.05%)	⬇️

... and 1 file with indirect coverage changes

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