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<?php |
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namespace Blasttech\EloquentRelatedPlus; |
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use DB; |
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use Illuminate\Database\Eloquent\Builder; |
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use Illuminate\Database\Eloquent\Relations\BelongsTo; |
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use Illuminate\Database\Eloquent\Relations\HasMany; |
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use Illuminate\Database\Eloquent\Relations\HasOneOrMany; |
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use Illuminate\Database\Eloquent\Relations\Relation; |
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use Illuminate\Database\Query\Expression; |
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use Illuminate\Database\Query\JoinClause; |
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/** |
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* Trait JoinsTrait |
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* |
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* @property array order_fields |
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* @property array order_defaults |
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* @property array order_relations |
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* @property array order_with |
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* @property array search_fields |
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* @property string connection |
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*/ |
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trait JoinsTrait |
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{ |
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/** |
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* Check relation type and join |
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* |
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* @param Relation $relation |
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* @param JoinClause $join |
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* @param \stdClass $table |
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* @param string $operator |
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* @param string $direction |
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* @return Builder|JoinClause |
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*/ |
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protected function relationJoinType($relation, $join, $table, $operator, $direction = null) |
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{ |
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// If a HasOne relation and ordered - ie join to the latest/earliest |
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if (class_basename($relation) === 'HasOne' && !empty($relation->toBase()->orders)) { |
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return $this->hasOneJoin($relation, $join); |
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} else { |
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return $this->hasManyJoin($relation, $join, $table, $operator, $direction); |
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} |
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} |
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/** |
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* Join a HasOne relation which is ordered |
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* |
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* @param Relation $relation |
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* @param JoinClause $join |
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* @return JoinClause |
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*/ |
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protected function hasOneJoin($relation, $join) |
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{ |
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// Get first relation order (should only be one) |
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$order = $relation->toBase()->orders[0]; |
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return $join->on($order['column'], $this->hasOneJoinSql($relation, $order)); |
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} |
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/** |
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* Get join sql for a HasOne relation |
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* |
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* @param Relation $relation |
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* @param array $order |
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* @return Expression |
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*/ |
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protected function hasOneJoinSql($relation, $order) |
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{ |
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// Build subquery for getting first/last record in related table |
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$subQuery = $this |
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->joinOne( |
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$relation->getRelated()->newQuery(), |
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$relation, |
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$order['column'], |
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$order['direction'] |
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) |
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->setBindings($relation->getBindings()); |
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return DB::raw('(' . $this->toSqlWithBindings($subQuery) . ')'); |
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} |
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/** |
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* Join a HasMany Relation |
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* |
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* @param Relation $relation |
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* @param JoinClause $join |
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* @param \stdClass $table |
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* @param string $operator |
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* @param string $direction |
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* @return Builder|JoinClause |
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*/ |
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protected function hasManyJoin($relation, $join, $table, $operator, $direction) |
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{ |
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// Get relation join columns |
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$joinColumns = $this->getJoinColumns($relation); |
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$joinColumns = $this->replaceColumnTables($joinColumns, $table); |
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$join->on($joinColumns->first, $operator, $joinColumns->second); |
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// Add any where clauses from the relationship |
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$join = $this->addRelatedWhereConstraints($join, $relation, $table->alias); |
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if (!is_null($direction) && get_class($relation) === HasMany::class) { |
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$join = $this->hasManyJoinWhere($join, $joinColumns->first, $relation, $table->alias, $direction); |
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} |
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return $join; |
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} |
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/** |
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* Get the join columns for a relation |
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* |
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* @param Relation|BelongsTo|HasOneOrMany $relation |
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* @return \stdClass |
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*/ |
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protected function getJoinColumns($relation) |
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{ |
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// Get keys with table names |
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if ($relation instanceof BelongsTo) { |
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$first = $relation->getOwnerKey(); |
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$second = $relation->getForeignKey(); |
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} else { |
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$first = $relation->getQualifiedParentKeyName(); |
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$second = $relation->getQualifiedForeignKeyName(); |
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} |
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return (object)['first' => $first, 'second' => $second]; |
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} |
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/** |
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* Replace column table names with aliases |
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* |
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* @param \stdClass $joinColumns |
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* @param \stdClass $table |
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* @return \stdClass |
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*/ |
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protected function replaceColumnTables($joinColumns, $table) |
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{ |
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if ($table->name !== $table->alias) { |
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$joinColumns->first = str_replace($table->name, $table->alias, $joinColumns->first); |
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$joinColumns->second = str_replace($table->name, $table->alias, $joinColumns->second); |
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} |
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return $joinColumns; |
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} |
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} |
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This check looks for
@paramannotations where the type inferred by our type inference engine differs from the declared type.It makes a suggestion as to what type it considers more descriptive.
Most often this is a case of a parameter that can be null in addition to its declared types.