Showing 83 of 83 total issues
LolDba::BelongsTo#non_polymorphic_fk manually dispatches method call Open
foreign_key ||= if reflection_options.respond_to?(:primary_key_name)
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Reek reports a Manual Dispatch smell if it finds source code that manually checks whether an object responds to a method before that method is called. Manual dispatch is a type of Simulated Polymorphism which leads to code that is harder to reason about, debug, and refactor.
Example
class MyManualDispatcher
attr_reader :foo
def initialize(foo)
@foo = foo
end
def call
foo.bar if foo.respond_to?(:bar)
end
end
Reek would emit the following warning:
test.rb -- 1 warning:
[9]: MyManualDispatcher manually dispatches method call (ManualDispatch)
LolDba::ErrorLogging has no descriptive comment Open
class ErrorLogging
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Classes and modules are the units of reuse and release. It is therefore considered good practice to annotate every class and module with a brief comment outlining its responsibilities.
Example
Given
class Dummy
# Do things...
end
Reek would emit the following warning:
test.rb -- 1 warning:
[1]:Dummy has no descriptive comment (IrresponsibleModule)
Fixing this is simple - just an explaining comment:
# The Dummy class is responsible for ...
class Dummy
# Do things...
end
LolDba has no descriptive comment Open
module LolDba
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Classes and modules are the units of reuse and release. It is therefore considered good practice to annotate every class and module with a brief comment outlining its responsibilities.
Example
Given
class Dummy
# Do things...
end
Reek would emit the following warning:
test.rb -- 1 warning:
[1]:Dummy has no descriptive comment (IrresponsibleModule)
Fixing this is simple - just an explaining comment:
# The Dummy class is responsible for ...
class Dummy
# Do things...
end
Complex method LolDba::HasMany#find_association_fk (22.5) Open
def find_association_fk
if (source = reflection_options.options[:source])
association_reflection = through_reflections[source.to_s]
return nil if association_reflection.options[:polymorphic]
get_through_foreign_key(association_reflection.klass, reflection_options)
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Flog calculates the ABC score for methods. The ABC score is based on assignments, branches (method calls), and conditions.
You can read more about ABC metrics or the flog tool
LolDba::SqlGenerator#migrator doesn't depend on instance state (maybe move it to another class?) Open
def migrator
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A Utility Function is any instance method that has no dependency on the state of the instance.
LolDba::MigrationFormatter#migration_instructions doesn't depend on instance state (maybe move it to another class?) Open
def migration_instructions(formated_indexes)
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A Utility Function is any instance method that has no dependency on the state of the instance.
LolDba::RelationInspector#get_through_foreign_key doesn't depend on instance state (maybe move it to another class?) Open
def get_through_foreign_key(target_class, reflection_options)
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A Utility Function is any instance method that has no dependency on the state of the instance.
LolDba::MigrationFormatter#format_index doesn't depend on instance state (maybe move it to another class?) Open
def format_index(table_name, key)
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A Utility Function is any instance method that has no dependency on the state of the instance.
LolDba::Migration#connection doesn't depend on instance state (maybe move it to another class?) Open
def connection
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A Utility Function is any instance method that has no dependency on the state of the instance.
LolDba::IndexFinder#self.check_for_indexes performs a nil-check Open
unless columns.nil? || reflection_options.options.include?(:class)
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A NilCheck
is a type check. Failures of NilCheck
violate the "tell, don't ask" principle.
Additionally, type checks often mask bigger problems in your source code like not using OOP and / or polymorphism when you should.
Example
Given
class Klass
def nil_checker(argument)
if argument.nil?
puts "argument isn't nil!"
end
end
end
Reek would emit the following warning:
test.rb -- 1 warning:
[3]:Klass#nil_checker performs a nil-check. (NilCheck)
LolDba::SqlGenerator#specific_migration has the variable name 'm' Open
migration = migrator.migrations.find { |m| m.version == which.to_i }
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An Uncommunicative Variable Name
is a variable name that doesn't communicate its intent well enough.
Poor names make it hard for the reader to build a mental picture of what's going on in the code. They can also be mis-interpreted; and they hurt the flow of reading, because the reader must slow down to interpret the names.
Missing top-level class documentation comment. Open
class HasMany < RelationInspector
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This cop checks for missing top-level documentation of classes and modules. Classes with no body are exempt from the check and so are namespace modules - modules that have nothing in their bodies except classes, other modules, or constant definitions.
The documentation requirement is annulled if the class or module has a "#:nodoc:" comment next to it. Likewise, "#:nodoc: all" does the same for all its children.
Example:
# bad
class Person
# ...
end
# good
# Description/Explanation of Person class
class Person
# ...
end
end
at 29, 8 is not aligned with if
at 25, 22. Open
end
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This cop checks whether the end keywords are aligned properly.
Three modes are supported through the EnforcedStyleAlignWith
configuration parameter:
If it's set to keyword
(which is the default), the end
shall be aligned with the start of the keyword (if, class, etc.).
If it's set to variable
the end
shall be aligned with the
left-hand-side of the variable assignment, if there is one.
If it's set to start_of_line
, the end
shall be aligned with the
start of the line where the matching keyword appears.
Example: EnforcedStyleAlignWith: keyword (default)
# bad
variable = if true
end
# good
variable = if true
end
Example: EnforcedStyleAlignWith: variable
# bad
variable = if true
end
# good
variable = if true
end
Example: EnforcedStyleAlignWith: startofline
# bad
variable = if true
end
# good
puts(if true
end)
Useless assignment to variable - foreign_key
. Use ||
instead of ||=
. Open
foreign_key ||= if reflection_options.respond_to?(:primary_key_name)
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This cop checks for every useless assignment to local variable in every
scope.
The basic idea for this cop was from the warning of ruby -cw
:
assigned but unused variable - foo
Currently this cop has advanced logic that detects unreferenced reassignments and properly handles varied cases such as branch, loop, rescue, ensure, etc.
Example:
# bad
def some_method
some_var = 1
do_something
end
Example:
# good
def some_method
some_var = 1
do_something(some_var)
end
Missing top-level class documentation comment. Open
class ErrorLogging
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This cop checks for missing top-level documentation of classes and modules. Classes with no body are exempt from the check and so are namespace modules - modules that have nothing in their bodies except classes, other modules, or constant definitions.
The documentation requirement is annulled if the class or module has a "#:nodoc:" comment next to it. Likewise, "#:nodoc: all" does the same for all its children.
Example:
# bad
class Person
# ...
end
# good
# Description/Explanation of Person class
class Person
# ...
end
Missing top-level class documentation comment. Open
class MigrationMocker
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This cop checks for missing top-level documentation of classes and modules. Classes with no body are exempt from the check and so are namespace modules - modules that have nothing in their bodies except classes, other modules, or constant definitions.
The documentation requirement is annulled if the class or module has a "#:nodoc:" comment next to it. Likewise, "#:nodoc: all" does the same for all its children.
Example:
# bad
class Person
# ...
end
# good
# Description/Explanation of Person class
class Person
# ...
end
required_ruby_version
(2.0, declared in lol_dba.gemspec) and TargetRubyVersion
(2.1, declared in .rubocop.yml) should be equal. Open
s.required_ruby_version = '>= 2.0.0'
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Checks that required_ruby_version
of gemspec and TargetRubyVersion
of .rubocop.yml are equal.
Thereby, RuboCop to perform static analysis working on the version
required by gemspec.
Example:
# When `TargetRubyVersion` of .rubocop.yml is `2.3`.
# bad
Gem::Specification.new do |spec|
spec.required_ruby_version = '>= 2.2.0'
end
# bad
Gem::Specification.new do |spec|
spec.required_ruby_version = '>= 2.4.0'
end
# good
Gem::Specification.new do |spec|
spec.required_ruby_version = '>= 2.3.0'
end
# good
Gem::Specification.new do |spec|
spec.required_ruby_version = '>= 2.3'
end
# good
Gem::Specification.new do |spec|
spec.required_ruby_version = ['>= 2.3.0', '< 2.5.0']
end
Line is too long. [119/100] Open
s.summary = 'A small package of rake tasks to track down missing database indexes and generate sql migration scripts'
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Useless assignment to variable - index_name
. Open
index_name = [association_fk, foreign_key].map(&:to_s).sort
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This cop checks for every useless assignment to local variable in every
scope.
The basic idea for this cop was from the warning of ruby -cw
:
assigned but unused variable - foo
Currently this cop has advanced logic that detects unreferenced reassignments and properly handles varied cases such as branch, loop, rescue, ensure, etc.
Example:
# bad
def some_method
some_var = 1
do_something
end
Example:
# good
def some_method
some_var = 1
do_something(some_var)
end
Missing top-level class documentation comment. Open
class MigrationFormatter
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This cop checks for missing top-level documentation of classes and modules. Classes with no body are exempt from the check and so are namespace modules - modules that have nothing in their bodies except classes, other modules, or constant definitions.
The documentation requirement is annulled if the class or module has a "#:nodoc:" comment next to it. Likewise, "#:nodoc: all" does the same for all its children.
Example:
# bad
class Person
# ...
end
# good
# Description/Explanation of Person class
class Person
# ...
end