| Total Complexity | 1 |
| Total Lines | 13 |
| Duplicated Lines | 100 % |
| Changes | 1 | ||
| Bugs | 0 | Features | 1 |
Duplicate code is one of the most pungent code smells. A rule that is often used is to re-structure code once it is duplicated in three or more places.
Common duplication problems, and corresponding solutions are:
| 1 | # frozen_string_literal: true |
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| 4 | View Code Duplication | class CreateStudyParticipants < ActiveRecord::Migration[5.1] |
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| 5 | def change |
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| 6 | create_table :study_participants do |t| |
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| 7 | t.references :participant, null: false, foreign_key: true |
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| 8 | t.references :study, null: false, foreign_key: true |
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| 9 | t.string :subject_number, null: true |
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| 10 | t.timestamps null: false, default: -> { 'CURRENT_TIMESTAMP' } |
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| 11 | end |
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| 12 | |||
| 13 | add_index :study_participants, %i[participant_id study_id], unique: true, name: 'index_participant_study' |
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| 14 | add_index :study_participants, %i[study_id subject_number], name: 'index_study_subject_number' |
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| 15 | end |
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| 16 | end |
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| 17 |