bug修复

[liangliangyy]

No description provided.

[codecov]

Codecov Report

Merging #174 into master will decrease coverage by 0.16%.
The diff coverage is 68.18%.

@@            Coverage Diff             @@
##           master     #174      +/-   ##
==========================================
- Coverage   85.84%   85.67%   -0.17%     
==========================================
  Files          49       49              
  Lines        1780     1794      +14     
==========================================
+ Hits         1528     1537       +9     
- Misses        252      257       +5

Impacted Files	Coverage Δ
DjangoBlog/blog_signals.py	76.82% <42.85%> (-2.44%)	⬇️
DjangoBlog/utils.py	83.43% <80%> (-0.44%)	⬇️

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[coveralls]

Coverage decreased (-0.2%) to 85.674% when pulling e5e2bab on dev into d7a2e64 on master.