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<?php |
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/** |
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* Spiral, Core Components |
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* |
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* @author Wolfy-J |
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*/ |
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namespace Spiral\ORM\Schemas\Relations; |
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use Spiral\ORM\Exceptions\DefinitionException; |
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use Spiral\ORM\Exceptions\RelationSchemaException; |
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use Spiral\ORM\Record; |
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use Spiral\ORM\Schemas\Definitions\RelationDefinition; |
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use Spiral\ORM\Schemas\InversableRelationInterface; |
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use Spiral\ORM\Schemas\Relations\Traits\ForeignsTrait; |
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use Spiral\ORM\Schemas\Relations\Traits\TypecastTrait; |
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use Spiral\ORM\Schemas\SchemaBuilder; |
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/** |
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* Declares simple has many relation. Relations like that used when parent record has many child |
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* with |
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* [outer] key linked to value of [inner] key of parent mode. Relation allow specifying default |
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* WHERE statement. Attention, WHERE statement will not be used in populating newly created record |
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* fields. |
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* |
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* Example, [User has many Comments], user primary key is "id": |
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* - relation will create outer key "user_id" in "comments" table (or other table name), nullable |
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* by default |
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* - relation will create index on column "user_id" in "comments" table if allowed |
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* - relation will create foreign key "comments"."user_id" => "users"."id" if allowed |
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* |
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* Note: relation can point to morphed records |
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*/ |
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class HasManySchema extends AbstractSchema implements InversableRelationInterface |
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{ |
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use TypecastTrait, ForeignsTrait; |
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/** |
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* Relation type. |
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*/ |
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const RELATION_TYPE = Record::HAS_MANY; |
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/** |
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* Options needed in runtime. |
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*/ |
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const PACK_OPTIONS = [ |
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Record::INNER_KEY, |
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Record::OUTER_KEY, |
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Record::NULLABLE, |
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Record::WHERE, |
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Record::RELATION_COLUMNS, |
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Record::MORPH_KEY, |
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Record::ORDER_BY |
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]; |
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/** |
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* {@inheritdoc} |
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*/ |
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const OPTIONS_TEMPLATE = [ |
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//Let's use parent record primary key as default inner key |
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Record::INNER_KEY => '{source:primaryKey}', |
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//Outer key will be based on parent record role and inner key name |
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Record::OUTER_KEY => '{source:role}_{option:innerKey}', |
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//Set constraints (foreign keys) by default |
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Record::CREATE_CONSTRAINT => true, |
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//@link https://en.wikipedia.org/wiki/Foreign_key |
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Record::CONSTRAINT_ACTION => 'CASCADE', |
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//We are going to make all relations nullable by default, so we can add fields to existed |
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//tables without raising an exceptions |
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Record::NULLABLE => true, |
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//Relation allowed to create indexes in outer table |
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Record::CREATE_INDEXES => true, |
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//HasMany allow us to define default WHERE statement for relation in a simplified array form |
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Record::WHERE => [], |
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//Relation can point to morphed record |
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Record::MORPH_KEY => null, |
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//Order |
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Record::ORDER_BY => [] |
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]; |
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/** |
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*{@inheritdoc} |
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*/ |
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public function inverseDefinition(SchemaBuilder $builder, $inverseTo): \Generator |
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{ |
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if (!is_string($inverseTo)) { |
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throw new DefinitionException("Inversed relation must be specified as string"); |
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} |
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if (empty($this->definition->targetContext())) { |
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throw new DefinitionException(sprintf( |
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"Unable to inverse relation %s.%s, unspecified relation target", |
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$this->definition->sourceContext()->getClass(), |
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$this->definition->getName() |
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)); |
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} |
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/** |
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* We are going to simply replace outer key with inner key and keep the rest of options intact. |
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*/ |
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$inversed = new RelationDefinition( |
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$inverseTo, |
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Record::BELONGS_TO, |
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$this->definition->sourceContext()->getClass(), |
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[ |
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Record::INNER_KEY => $this->option(Record::OUTER_KEY), |
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Record::OUTER_KEY => $this->option(Record::INNER_KEY), |
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Record::CREATE_CONSTRAINT => $this->option(Record::CREATE_CONSTRAINT), |
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Record::CONSTRAINT_ACTION => $this->option(Record::CONSTRAINT_ACTION), |
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Record::CREATE_INDEXES => $this->option(Record::CREATE_INDEXES), |
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Record::NULLABLE => $this->option(Record::NULLABLE), |
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] |
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); |
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//In back order :) |
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yield $inversed->withContext( |
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$this->definition->targetContext(), |
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$this->definition->sourceContext() |
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); |
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} |
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/** |
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* {@inheritdoc} |
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*/ |
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public function declareTables(SchemaBuilder $builder): array |
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{ |
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$sourceTable = $this->sourceTable($builder); |
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$targetTable = $this->targetTable($builder); |
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if (!$sourceTable->hasColumn($this->option(Record::INNER_KEY))) { |
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throw new RelationSchemaException(sprintf("Inner key '%s'.'%s' (%s) does not exists", |
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$sourceTable->getName(), |
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$this->option(Record::INNER_KEY), |
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$this->definition->getName() |
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)); |
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} |
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//Column to be used as outer key |
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$outerKey = $targetTable->column($this->option(Record::OUTER_KEY)); |
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//Column to be used as inner key |
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$innerKey = $sourceTable->column($this->option(Record::INNER_KEY)); |
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//Syncing types |
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$outerKey->setType($this->resolveType($innerKey)); |
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//If nullable |
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$outerKey->nullable($this->option(Record::NULLABLE)); |
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//Do we need indexes? |
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if ($this->option(Record::CREATE_INDEXES)) { |
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$targetTable->index([$outerKey->getName()]); |
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} |
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if ($this->isConstrained()) { |
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$this->createForeign( |
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$targetTable, |
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$outerKey, |
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$innerKey, |
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$this->option(Record::CONSTRAINT_ACTION), |
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$this->option(Record::CONSTRAINT_ACTION) |
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); |
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} |
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return [$targetTable]; |
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} |
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} |
spiral /
orm
