ManageIQ/manageiq

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app/models/chargeback_rate_detail.rb

Summary

Maintainability
A
3 hrs
Test Coverage
B
85%

Cyclomatic complexity for contiguous_tiers? is too high. [15/11]
Open

  def contiguous_tiers?
    error = false

    # Note, we use sort_by vs. order since we need to call this method against
    # the in memory chargeback_tiers association and NOT hit the database.

This cop checks that the cyclomatic complexity of methods is not higher than the configured maximum. The cyclomatic complexity is the number of linearly independent paths through a method. The algorithm counts decision points and adds one.

An if statement (or unless or ?:) increases the complexity by one. An else branch does not, since it doesn't add a decision point. The && operator (or keyword and) can be converted to a nested if statement, and ||/or is shorthand for a sequence of ifs, so they also add one. Loops can be said to have an exit condition, so they add one.

Method contiguous_tiers? has a Cognitive Complexity of 22 (exceeds 11 allowed). Consider refactoring.
Open

  def contiguous_tiers?
    error = false

    # Note, we use sort_by vs. order since we need to call this method against
    # the in memory chargeback_tiers association and NOT hit the database.
Severity: Minor
Found in app/models/chargeback_rate_detail.rb - 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

Method default_rate_details_for has a Cognitive Complexity of 14 (exceeds 11 allowed). Consider refactoring.
Open

  def self.default_rate_details_for(rate_type)
    rate_details = []

    fixture_file = File.join(FIXTURE_DIR, "chargeback_rates.yml")
    fixture = File.exist?(fixture_file) ? YAML.load_file(fixture_file) : []
Severity: Minor
Found in app/models/chargeback_rate_detail.rb - About 45 mins 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

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

    {'bytes'     => '',
     'kilobytes' => 'KiB',
     'megabytes' => 'MiB',
     'gigabytes' => 'GiB',
     'terabytes' => 'TiB',
Severity: Minor
Found in app/models/chargeback_rate_detail.rb and 1 other location - About 25 mins to fix
app/models/hardware.rb on lines 62..65

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 29.

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

private (on line 246) does not make singleton methods private. Use private_class_method or private inside a class << self block instead.
Open

  def self.default_rate_details_for(rate_type)

This cop checks for private or protected access modifiers which are applied to a singleton method. These access modifiers do not make singleton methods private/protected. private_class_method can be used for that.

Example:

# bad

class C
  private

  def self.method
    puts 'hi'
  end
end

Example:

# good

class C
  def self.method
    puts 'hi'
  end

  private_class_method :method
end

Example:

# good

class C
  class << self
    private

    def method
      puts 'hi'
    end
  end
end

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