Code Duplication    Length = 20-21 lines in 3 locations

src/Phinx/Db/Adapter/PostgresAdapter.php 1 location

@@ 647-667 (lines=21) @@
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    /**
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     * {@inheritdoc}
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     */
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    public function hasForeignKey($tableName, $columns, $constraint = null)
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    {
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        if (is_string($columns)) {
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            $columns = [$columns]; // str to array
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        }
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        $foreignKeys = $this->getForeignKeys($tableName);
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        if ($constraint) {
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            if (isset($foreignKeys[$constraint])) {
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                return !empty($foreignKeys[$constraint]);
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            }
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            return false;
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        } else {
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            foreach ($foreignKeys as $key) {
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                $a = array_diff($columns, $key['columns']);
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                if (empty($a)) {
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                    return true;
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                }
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            }
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            return false;
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        }
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    }
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src/Phinx/Db/Adapter/SqlServerAdapter.php 1 location

@@ 761-781 (lines=21) @@
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    /**
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     * {@inheritdoc}
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     */
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    public function hasForeignKey($tableName, $columns, $constraint = null)
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    {
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        if (is_string($columns)) {
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            $columns = [$columns]; // str to array
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        }
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        $foreignKeys = $this->getForeignKeys($tableName);
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        if ($constraint) {
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            if (isset($foreignKeys[$constraint])) {
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                return !empty($foreignKeys[$constraint]);
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            }
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            return false;
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        } else {
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            foreach ($foreignKeys as $key) {
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                $a = array_diff($columns, $key['columns']);
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                if (empty($a)) {
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                    return true;
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                }
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            }
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            return false;
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        }
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    }
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src/Phinx/Db/Adapter/MysqlAdapter.php 1 location

@@ 590-609 (lines=20) @@
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    /**
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     * {@inheritdoc}
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     */
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    public function hasForeignKey($tableName, $columns, $constraint = null)
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    {
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        if (is_string($columns)) {
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            $columns = [ $columns ]; // str to array
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        }
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        $foreignKeys = $this->getForeignKeys($tableName);
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        if ($constraint) {
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            if (isset($foreignKeys[$constraint])) {
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                return ! empty($foreignKeys[$constraint]);
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            }
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            return false;
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        } else {
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            foreach ($foreignKeys as $key) {
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                if ($columns == $key['columns']) {
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                    return true;
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                }
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            }
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            return false;
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        }
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    }
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