django/django

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django/core/serializers/__init__.py

Summary

Maintainability
D
1 day
Test Coverage

Function sort_dependencies has a Cognitive Complexity of 47 (exceeds 5 allowed). Consider refactoring.
Open

def sort_dependencies(app_list):
    """Sort a list of (app_config, models) pairs into a single list of models.

    The single list of models is sorted so that any model with a natural key
    is serialized before a normal model, and any model with a natural key
Severity: Minor
Found in django/core/serializers/__init__.py - About 7 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

Avoid deeply nested control flow statements.
Open

                    if hasattr(rel_model, 'natural_key') and rel_model != model:
                        deps.append(rel_model)
            model_dependencies.append((model, deps))
Severity: Major
Found in django/core/serializers/__init__.py - About 45 mins to fix

    Avoid deeply nested control flow statements.
    Open

                        if hasattr(rel_model, 'natural_key') and rel_model != model:
                            deps.append(rel_model)
                # Also add a dependency for any simple M2M relation with a model
                # that defines a natural key.  M2M relations with explicit through
                # models don't count as dependencies.
    Severity: Major
    Found in django/core/serializers/__init__.py - About 45 mins to fix

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

      def get_serializer(format):
          if not _serializers:
              _load_serializers()
          if format not in _serializers:
              raise SerializerDoesNotExist(format)
      Severity: Major
      Found in django/core/serializers/__init__.py and 1 other location - About 1 hr to fix
      django/core/serializers/__init__.py on lines 114..119

      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 47.

      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

      def get_deserializer(format):
          if not _serializers:
              _load_serializers()
          if format not in _serializers:
              raise SerializerDoesNotExist(format)
      Severity: Major
      Found in django/core/serializers/__init__.py and 1 other location - About 1 hr to fix
      django/core/serializers/__init__.py on lines 94..99

      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 47.

      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

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

                      if field.remote_field.through._meta.auto_created:
                          rel_model = field.remote_field.model
                          if hasattr(rel_model, 'natural_key') and rel_model != model:
                              deps.append(rel_model)
      Severity: Major
      Found in django/core/serializers/__init__.py and 1 other location - About 1 hr to fix
      django/core/serializers/__init__.py on lines 186..189

      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 39.

      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

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

                      if field.remote_field:
                          rel_model = field.remote_field.model
                          if hasattr(rel_model, 'natural_key') and rel_model != model:
                              deps.append(rel_model)
      Severity: Major
      Found in django/core/serializers/__init__.py and 1 other location - About 1 hr to fix
      django/core/serializers/__init__.py on lines 194..197

      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 39.

      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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