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<?php |
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namespace Backpack\CRUD\app\Models\Traits; |
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trait HasIdentifiableAttribute |
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{ |
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/** |
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* Get the name of the attribute that best defines the entry, from the user perspective. |
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* |
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* Rephrased: In most cases a user will NOT identify an Article because its ID is "4", but |
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* because its name is "10 Ways to Burn Fat". This method returns the column in the database |
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* that represents that is better to show to the user as an identifier rather than the ID. |
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* Ex: name, title, label, description etc. |
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* |
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* @return string The name of the column that best defines this entry from the user perspective. |
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*/ |
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public static function getIdentifiableName() |
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{ |
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$model = (new self); |
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if (method_exists($model, 'identifiableName')) { |
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return $model->identifiableName(); |
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} |
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return static::guessIdentifiableColumnName(); |
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} |
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/** |
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* Get the most likely column in the db table that could be used as an identifiable attribute. |
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* |
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* @return string The name of the column in the database that is most likely to be a good indentifying attribute. |
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*/ |
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public static function guessIdentifiableColumnName() |
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{ |
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$instance = new static(); |
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$conn = $instance->getConnectionWithExtraTypeMappings(); |
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$table = $instance->getTableWithPrefix(); |
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$columns = $conn->getDoctrineSchemaManager()->listTableColumns($table); |
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$indexes = $conn->getDoctrineSchemaManager()->listTableIndexes($table); |
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$columnsNames = array_keys($columns); |
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// these column names are sensible defaults for lots of use cases |
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$sensibleDefaultNames = ['name', 'title', 'description', 'label']; |
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// if any of the sensibleDefaultNames column exists |
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// that's probably a good choice |
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foreach ($sensibleDefaultNames as $defaultName) { |
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if (in_array($defaultName, $columnsNames)) { |
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return $defaultName; |
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} |
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} |
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// get indexed columns in database table |
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$indexedColumns = []; |
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foreach ($indexes as $index) { |
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$indexColumns = $index->getColumns(); |
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foreach ($indexColumns as $ic) { |
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array_push($indexedColumns, $ic); |
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} |
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} |
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// if none of the sensible defaults exists |
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// we get the first column from database |
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// that is NOT indexed (usually primary, foreign keys) |
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foreach ($columns as $columnName => $columnProperties) { |
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if (! in_array($columnName, $indexedColumns)) { |
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//check for convention "field<_id>" in case developer didn't add foreign key constraints. |
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if (strpos($columnName, '_id') !== false) { |
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continue; |
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} |
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return $columnName; |
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} |
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} |
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// in case everything fails we just return the first column in database |
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return \Arr::first($columnsNames); |
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} |
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} |
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Laravel-Backpack /
CRUD
Loading history...
This check looks for methods that are used by a trait but not required by it.
To illustrate, let’s look at the following code example
The trait
Idableprovides a methodequalsIdthat in turn relies on the methodgetId(). If this method does not exist on a class mixing in this trait, the method will fail.Adding the
getId()as an abstract method to the trait will make sure it is available.