Mass assignment is not restricted using attr_accessible Open
class ContentItemRelation < ActiveRecord::Base
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- Exclude checks
This warning comes up if a model does not limit what attributes can be set through mass assignment.
In particular, this check looks for attr_accessible
inside model definitions. If it is not found, this warning will be issued.
Brakeman also warns on use of attr_protected
- especially since it was found to be vulnerable to bypass. Warnings for mass assignment on models using attr_protected
will be reported, but at a lower confidence level.
Note that disabling mass assignment globally will suppress these warnings.
Assignment Branch Condition size for find_relation_to_topic is too high. [19.21/15] Open
def self.find_relation_to_topic(topic_id, related_item, options = {})
topic_id = topic_id.is_a?(Topic) ? topic_id.id : topic_id
options = { deleted: false }.merge(options)
# Set the class to run the find on.
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- Exclude checks
This cop checks that the ABC size of methods is not higher than the configured maximum. The ABC size is based on assignments, branches (method calls), and conditions. See http://c2.com/cgi/wiki?AbcMetric
Method find_relation_to_topic
has a Cognitive Complexity of 6 (exceeds 5 allowed). Consider refactoring. Open
def self.find_relation_to_topic(topic_id, related_item, options = {})
topic_id = topic_id.is_a?(Topic) ? topic_id.id : topic_id
options = { deleted: false }.merge(options)
# Set the class to run the find on.
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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 new_relation_to_topic
has a Cognitive Complexity of 6 (exceeds 5 allowed). Consider refactoring. Open
def self.new_relation_to_topic(topic_id, related_item)
# Undestroy a previous version if present, rather than creating a new relationship.
if content_item_relation = find_relation_to_topic(topic_id, related_item, deleted: true)
content_item_relation.undestroy!
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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
protected
(on line 48) does not make singleton methods protected. Use protected
inside a class << self
block instead. Open
def self.find_relation_to_topic(topic_id, related_item, options = {})
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- Exclude checks
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
Use ==
if you meant to do a comparison or wrap the expression in parentheses to indicate you meant to assign in a condition. Open
if content_item_relation = find_relation_to_topic(topic_id, related_item, deleted: true)
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- Exclude checks
This cop checks for assignments in the conditions of if/while/until.
Example:
# bad
if some_var = true
do_something
end
Example:
# good
if some_var == true
do_something
end
Useless assignment to variable - content_item_relation
. Open
content_item_relation = create!(
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- Exclude checks
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
Useless assignment to variable - relation
. Use ||
instead of ||=
. Open
relation ||= find_class.where(topic_id: topic_id).where(related_item_id: related_item.id).where(related_item_type: related_item.class.name.to_s).first
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- Exclude checks
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
Favor a normal unless-statement over a modifier clause in a multiline statement. Open
content_item_relation = create!(
# Handle topic_id being passed in as Topic instead of Integer or String.
topic_id: topic_id.is_a?(Topic) ? topic_id.id : topic_id,
related_item: related_item
) unless find_relation_to_topic(topic_id, related_item)
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- Exclude checks
Checks for uses of if/unless modifiers with multiple-lines bodies.
Example:
# bad
{
result: 'this should not happen'
} unless cond
# good
{ result: 'ok' } if cond
Useless protected
access modifier. Open
protected
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- Exclude checks
This cop checks for redundant access modifiers, including those with no
code, those which are repeated, and leading public
modifiers in a
class or module body. Conditionally-defined methods are considered as
always being defined, and thus access modifiers guarding such methods
are not redundant.
Example:
class Foo
public # this is redundant (default access is public)
def method
end
private # this is not redundant (a method is defined)
def method2
end
private # this is redundant (no following methods are defined)
end
Example:
class Foo
# The following is not redundant (conditionally defined methods are
# considered as always defining a method)
private
if condition?
def method
end
end
protected # this is not redundant (method is defined)
define_method(:method2) do
end
protected # this is redundant (repeated from previous modifier)
[1,2,3].each do |i|
define_method("foo#{i}") do
end
end
# The following is redundant (methods defined on the class'
# singleton class are not affected by the public modifier)
public
def self.method3
end
end
Example:
# Lint/UselessAccessModifier:
# ContextCreatingMethods:
# - concerning
require 'active_support/concern'
class Foo
concerning :Bar do
def some_public_method
end
private
def some_private_method
end
end
# this is not redundant because `concerning` created its own context
private
def some_other_private_method
end
end
Example:
# Lint/UselessAccessModifier:
# MethodCreatingMethods:
# - delegate
require 'active_support/core_ext/module/delegation'
class Foo
# this is not redundant because `delegate` creates methods
private
delegate :method_a, to: :method_b
end