LowFile-scopeRuby Plug & play

Extract duplicated field lists to constants

When the same set of attribute/field names is used in multiple places (strong params, serializers, queries), extract it to a constant and reuse.

Why this matters

Avoids drift and typos; a single edit updates all call sites.

Side-by-side examples engineers can pattern-match during review.

Avoid

params.require(:user).permit(:name, :email, :role)
User.select(:name, :email, :role)

Prefer

FIELDS = %i[name email role].freeze
params.require(:user).permit(*FIELDS)
User.select(*FIELDS)

Bad

permit(:a, :b, :c) in many files

Good

FIELDS = %i[a b c].freeze; permit(*FIELDS)

From the same buckets as this rule.

Critical
Avoid Duplicating String Literals
Store repeated string literals in constants or variables to improve maintainability and reduce redundancy.
duplication-complexitymaintainability
Critical
Avoid Redundant `None` Comparisons
Identify cases where `x is None` or `x is not None` is used redundantly when `x` is always or never `None`. This may indicate a deeper logic issue.
duplication-complexityreadability-refactor+1
High
Avoid Functions That Always Return the Same Value
Identify functions that return the same value regardless of input. This may indicate poor design or a logic error.
duplication-complexityreadability-refactor+1