ViewsSchema#self.each_view yields 4 parameters Open
yield(name, matched[:statement], matched[:algorithm], matched[:security])
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A Long Yield List occurs when a method yields a lot of arguments to the block it gets passed.
Example
class Dummy
def yields_a_lot(foo,bar,baz,fling,flung)
yield foo,bar,baz,fling,flung
end
end
Reek would report the following warning:
test.rb -- 1 warning:
[4]:Dummy#yields_a_lot yields 5 parameters (LongYieldList)
A common solution to this problem would be the introduction of parameter objects.
ViewsSchema#self.create_view has 4 parameters Open
def self.create_view(name, statement, algorithm: ALGORITHMS.first, security: SECURITIES.first)
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A Long Parameter List
occurs when a method has a lot of parameters.
Example
Given
class Dummy
def long_list(foo,bar,baz,fling,flung)
puts foo,bar,baz,fling,flung
end
end
Reek would report the following warning:
test.rb -- 1 warning:
[2]:Dummy#long_list has 5 parameters (LongParameterList)
A common solution to this problem would be the introduction of parameter objects.
ViewsSchema#self.each_view has approx 7 statements Open
def self.each_view
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A method with Too Many Statements
is any method that has a large number of lines.
Too Many Statements
warns about any method that has more than 5 statements. Reek's smell detector for Too Many Statements
counts +1 for every simple statement in a method and +1 for every statement within a control structure (if
, else
, case
, when
, for
, while
, until
, begin
, rescue
) but it doesn't count the control structure itself.
So the following method would score +6 in Reek's statement-counting algorithm:
def parse(arg, argv, &error)
if !(val = arg) and (argv.empty? or /\A-/ =~ (val = argv[0]))
return nil, block, nil # +1
end
opt = (val = parse_arg(val, &error))[1] # +2
val = conv_arg(*val) # +3
if opt and !arg
argv.shift # +4
else
val[0] = nil # +5
end
val # +6
end
(You might argue that the two assigments within the first @if@ should count as statements, and that perhaps the nested assignment should count as +2.)
ViewsSchema#self.update_view has 4 parameters Open
def self.update_view(name, statement, algorithm: ALGORITHMS.first, security: SECURITIES.first)
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A Long Parameter List
occurs when a method has a lot of parameters.
Example
Given
class Dummy
def long_list(foo,bar,baz,fling,flung)
puts foo,bar,baz,fling,flung
end
end
Reek would report the following warning:
test.rb -- 1 warning:
[2]:Dummy#long_list has 5 parameters (LongParameterList)
A common solution to this problem would be the introduction of parameter objects.
Complex method ViewsSchema::each_view (23.7) Open
def self.each_view
all_views.each do |name|
query = ActiveRecord::Base.connection.exec_query("SHOW CREATE TABLE #{name}").first
matched = REGEXP.match(query['Create View'])
yield(name, matched[:statement], matched[:algorithm], matched[:security])
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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
ViewsSchema#self.execute manually dispatches method call Open
args[:statement] = args[:statement].to_sql if args[:statement].respond_to?(:to_sql)
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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)
ViewsSchema#self.drop_view calls 'args[:name]' 2 times Open
raise "Invalid name: `#{args[:name]}`" unless /^[a-z0-9_]*$/.match?(args[:name])
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Duplication occurs when two fragments of code look nearly identical, or when two fragments of code have nearly identical effects at some conceptual level.
Reek implements a check for Duplicate Method Call.
Example
Here's a very much simplified and contrived example. The following method will report a warning:
def double_thing()
@other.thing + @other.thing
end
One quick approach to silence Reek would be to refactor the code thus:
def double_thing()
thing = @other.thing
thing + thing
end
A slightly different approach would be to replace all calls of double_thing
by calls to @other.double_thing
:
class Other
def double_thing()
thing + thing
end
end
The approach you take will depend on balancing other factors in your code.
ViewsSchema#self.all_views calls 'ActiveRecord::Base; .connection' 2 times Open
ActiveRecord::Base
.connection
.execute(
"
SELECT TABLE_NAME AS name
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Duplication occurs when two fragments of code look nearly identical, or when two fragments of code have nearly identical effects at some conceptual level.
Reek implements a check for Duplicate Method Call.
Example
Here's a very much simplified and contrived example. The following method will report a warning:
def double_thing()
@other.thing + @other.thing
end
One quick approach to silence Reek would be to refactor the code thus:
def double_thing()
thing = @other.thing
thing + thing
end
A slightly different approach would be to replace all calls of double_thing
by calls to @other.double_thing
:
class Other
def double_thing()
thing + thing
end
end
The approach you take will depend on balancing other factors in your code.
ViewsSchema#self.execute calls 'args[:name]' 2 times Open
raise "Invalid name: `#{args[:name]}`" unless /^[a-z0-9_]*$/.match?(args[:name])
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Duplication occurs when two fragments of code look nearly identical, or when two fragments of code have nearly identical effects at some conceptual level.
Reek implements a check for Duplicate Method Call.
Example
Here's a very much simplified and contrived example. The following method will report a warning:
def double_thing()
@other.thing + @other.thing
end
One quick approach to silence Reek would be to refactor the code thus:
def double_thing()
thing = @other.thing
thing + thing
end
A slightly different approach would be to replace all calls of double_thing
by calls to @other.double_thing
:
class Other
def double_thing()
thing + thing
end
end
The approach you take will depend on balancing other factors in your code.
ViewsSchema#self.execute calls 'args[:statement]' 2 times Open
args[:statement] = args[:statement].to_sql if args[:statement].respond_to?(:to_sql)
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Duplication occurs when two fragments of code look nearly identical, or when two fragments of code have nearly identical effects at some conceptual level.
Reek implements a check for Duplicate Method Call.
Example
Here's a very much simplified and contrived example. The following method will report a warning:
def double_thing()
@other.thing + @other.thing
end
One quick approach to silence Reek would be to refactor the code thus:
def double_thing()
thing = @other.thing
thing + thing
end
A slightly different approach would be to replace all calls of double_thing
by calls to @other.double_thing
:
class Other
def double_thing()
thing + thing
end
end
The approach you take will depend on balancing other factors in your code.
ViewsSchema#self.all_views has the variable name 'v' Open
.map do |v|
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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.
ViewsSchema#self.each_view has the variable name 'e' Open
rescue ActiveRecord::StatementInvalid => e
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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.