django/django

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django/db/migrations/writer.py

Summary

Maintainability
F
3 days
Test Coverage

Function serialize has a Cognitive Complexity of 54 (exceeds 5 allowed). Consider refactoring.
Open

    def serialize(self):

        def _write(_arg_name, _arg_value):
            if (_arg_name in self.operation.serialization_expand_args and
                    isinstance(_arg_value, (list, tuple, dict))):
Severity: Minor
Found in django/db/migrations/writer.py - About 1 day to fix

Cognitive Complexity

Cognitive Complexity is a measure of how difficult a unit of code is to intuitively understand. Unlike Cyclomatic Complexity, which determines how difficult your code will be to test, Cognitive Complexity tells you how difficult your code will be to read and comprehend.

A method's cognitive complexity is based on a few simple rules:

  • Code is not considered more complex when it uses shorthand that the language provides for collapsing multiple statements into one
  • Code is considered more complex for each "break in the linear flow of the code"
  • Code is considered more complex when "flow breaking structures are nested"

Further reading

Function as_string has a Cognitive Complexity of 18 (exceeds 5 allowed). Consider refactoring.
Open

    def as_string(self):
        """Return a string of the file contents."""
        items = {
            "replaces_str": "",
            "initial_str": "",
Severity: Minor
Found in django/db/migrations/writer.py - About 2 hrs to fix

Cognitive Complexity

Cognitive Complexity is a measure of how difficult a unit of code is to intuitively understand. Unlike Cyclomatic Complexity, which determines how difficult your code will be to test, Cognitive Complexity tells you how difficult your code will be to read and comprehend.

A method's cognitive complexity is based on a few simple rules:

  • Code is not considered more complex when it uses shorthand that the language provides for collapsing multiple statements into one
  • Code is considered more complex for each "break in the linear flow of the code"
  • Code is considered more complex when "flow breaking structures are nested"

Further reading

Function basedir has a Cognitive Complexity of 14 (exceeds 5 allowed). Consider refactoring.
Open

    def basedir(self):
        migrations_package_name, _ = MigrationLoader.migrations_module(self.migration.app_label)

        if migrations_package_name is None:
            raise ValueError(
Severity: Minor
Found in django/db/migrations/writer.py - About 1 hr to fix

Cognitive Complexity

Cognitive Complexity is a measure of how difficult a unit of code is to intuitively understand. Unlike Cyclomatic Complexity, which determines how difficult your code will be to test, Cognitive Complexity tells you how difficult your code will be to read and comprehend.

A method's cognitive complexity is based on a few simple rules:

  • Code is not considered more complex when it uses shorthand that the language provides for collapsing multiple statements into one
  • Code is considered more complex for each "break in the linear flow of the code"
  • Code is considered more complex when "flow breaking structures are nested"

Further reading

Avoid deeply nested control flow statements.
Open

                            for arg in args[:-1]:
                                self.feed(arg)
                            self.feed('%s,' % args[-1])
Severity: Major
Found in django/db/migrations/writer.py - About 45 mins to fix

    Avoid deeply nested control flow statements.
    Open

                                for arg in args[1:-1]:
                                    self.feed(arg)
                                self.feed('%s,' % args[-1])
    Severity: Major
    Found in django/db/migrations/writer.py - About 45 mins to fix

      Similar blocks of code found in 2 locations. Consider refactoring.
      Open

                      if len(args) > 1:
                          self.feed('%s=%s' % (_arg_name, args[0]))
                          for arg in args[1:-1]:
                              self.feed(arg)
                          self.feed('%s,' % args[-1])
      Severity: Major
      Found in django/db/migrations/writer.py and 1 other location - About 6 hrs to fix
      django/db/migrations/writer.py on lines 36..42

      Duplicated Code

      Duplicated code can lead to software that is hard to understand and difficult to change. The Don't Repeat Yourself (DRY) principle states:

      Every piece of knowledge must have a single, unambiguous, authoritative representation within a system.

      When you violate DRY, bugs and maintenance problems are sure to follow. Duplicated code has a tendency to both continue to replicate and also to diverge (leaving bugs as two similar implementations differ in subtle ways).

      Tuning

      This issue has a mass of 101.

      We set useful threshold defaults for the languages we support but you may want to adjust these settings based on your project guidelines.

      The threshold configuration represents the minimum mass a code block must have to be analyzed for duplication. The lower the threshold, the more fine-grained the comparison.

      If the engine is too easily reporting duplication, try raising the threshold. If you suspect that the engine isn't catching enough duplication, try lowering the threshold. The best setting tends to differ from language to language.

      See codeclimate-duplication's documentation for more information about tuning the mass threshold in your .codeclimate.yml.

      Refactorings

      Further Reading

      Similar blocks of code found in 2 locations. Consider refactoring.
      Open

                              if len(args) > 1:
                                  self.feed('%s: %s' % (key_string, args[0]))
                                  for arg in args[1:-1]:
                                      self.feed(arg)
                                  self.feed('%s,' % args[-1])
      Severity: Major
      Found in django/db/migrations/writer.py and 1 other location - About 6 hrs to fix
      django/db/migrations/writer.py on lines 65..71

      Duplicated Code

      Duplicated code can lead to software that is hard to understand and difficult to change. The Don't Repeat Yourself (DRY) principle states:

      Every piece of knowledge must have a single, unambiguous, authoritative representation within a system.

      When you violate DRY, bugs and maintenance problems are sure to follow. Duplicated code has a tendency to both continue to replicate and also to diverge (leaving bugs as two similar implementations differ in subtle ways).

      Tuning

      This issue has a mass of 101.

      We set useful threshold defaults for the languages we support but you may want to adjust these settings based on your project guidelines.

      The threshold configuration represents the minimum mass a code block must have to be analyzed for duplication. The lower the threshold, the more fine-grained the comparison.

      If the engine is too easily reporting duplication, try raising the threshold. If you suspect that the engine isn't catching enough duplication, try lowering the threshold. The best setting tends to differ from language to language.

      See codeclimate-duplication's documentation for more information about tuning the mass threshold in your .codeclimate.yml.

      Refactorings

      Further Reading

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