374 lines
11 KiB
PHP
374 lines
11 KiB
PHP
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<?php
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namespace Illuminate\Database\Schema\Grammars;
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use BackedEnum;
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use Illuminate\Contracts\Database\Query\Expression;
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use Illuminate\Database\Concerns\CompilesJsonPaths;
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use Illuminate\Database\Connection;
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use Illuminate\Database\Grammar as BaseGrammar;
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use Illuminate\Database\Schema\Blueprint;
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use Illuminate\Support\Fluent;
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use LogicException;
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use RuntimeException;
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abstract class Grammar extends BaseGrammar
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{
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use CompilesJsonPaths;
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/**
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* The possible column modifiers.
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*
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* @var string[]
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*/
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protected $modifiers = [];
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/**
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* If this Grammar supports schema changes wrapped in a transaction.
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*
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* @var bool
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*/
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protected $transactions = false;
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/**
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* The commands to be executed outside of create or alter command.
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*
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* @var array
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*/
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protected $fluentCommands = [];
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/**
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* Compile a create database command.
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*
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* @param string $name
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* @param \Illuminate\Database\Connection $connection
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* @return void
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*
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* @throws \LogicException
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*/
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public function compileCreateDatabase($name, $connection)
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{
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throw new LogicException('This database driver does not support creating databases.');
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}
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/**
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* Compile a drop database if exists command.
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*
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* @param string $name
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* @return void
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*
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* @throws \LogicException
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*/
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public function compileDropDatabaseIfExists($name)
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{
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throw new LogicException('This database driver does not support dropping databases.');
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}
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/**
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* Compile a rename column command.
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*
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* @param \Illuminate\Database\Schema\Blueprint $blueprint
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* @param \Illuminate\Support\Fluent $command
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* @param \Illuminate\Database\Connection $connection
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* @return array|string
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*/
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public function compileRenameColumn(Blueprint $blueprint, Fluent $command, Connection $connection)
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{
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return sprintf('alter table %s rename column %s to %s',
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$this->wrapTable($blueprint),
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$this->wrap($command->from),
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$this->wrap($command->to)
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);
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}
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/**
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* Compile a change column command into a series of SQL statements.
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*
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* @param \Illuminate\Database\Schema\Blueprint $blueprint
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* @param \Illuminate\Support\Fluent $command
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* @param \Illuminate\Database\Connection $connection
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* @return array|string
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*
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* @throws \RuntimeException
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*/
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public function compileChange(Blueprint $blueprint, Fluent $command, Connection $connection)
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{
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throw new LogicException('This database driver does not support modifying columns.');
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}
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/**
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* Compile a fulltext index key command.
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*
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* @param \Illuminate\Database\Schema\Blueprint $blueprint
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* @param \Illuminate\Support\Fluent $command
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* @return string
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*
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* @throws \RuntimeException
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*/
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public function compileFulltext(Blueprint $blueprint, Fluent $command)
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{
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throw new RuntimeException('This database driver does not support fulltext index creation.');
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}
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/**
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* Compile a drop fulltext index command.
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*
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* @param \Illuminate\Database\Schema\Blueprint $blueprint
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* @param \Illuminate\Support\Fluent $command
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* @return string
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*
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* @throws \RuntimeException
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*/
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public function compileDropFullText(Blueprint $blueprint, Fluent $command)
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{
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throw new RuntimeException('This database driver does not support fulltext index removal.');
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}
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/**
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* Compile a foreign key command.
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*
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* @param \Illuminate\Database\Schema\Blueprint $blueprint
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* @param \Illuminate\Support\Fluent $command
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* @return string
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*/
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public function compileForeign(Blueprint $blueprint, Fluent $command)
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{
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// We need to prepare several of the elements of the foreign key definition
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// before we can create the SQL, such as wrapping the tables and convert
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// an array of columns to comma-delimited strings for the SQL queries.
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$sql = sprintf('alter table %s add constraint %s ',
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$this->wrapTable($blueprint),
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$this->wrap($command->index)
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);
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// Once we have the initial portion of the SQL statement we will add on the
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// key name, table name, and referenced columns. These will complete the
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// main portion of the SQL statement and this SQL will almost be done.
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$sql .= sprintf('foreign key (%s) references %s (%s)',
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$this->columnize($command->columns),
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$this->wrapTable($command->on),
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$this->columnize((array) $command->references)
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);
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// Once we have the basic foreign key creation statement constructed we can
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// build out the syntax for what should happen on an update or delete of
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// the affected columns, which will get something like "cascade", etc.
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if (! is_null($command->onDelete)) {
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$sql .= " on delete {$command->onDelete}";
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}
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if (! is_null($command->onUpdate)) {
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$sql .= " on update {$command->onUpdate}";
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}
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return $sql;
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}
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/**
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* Compile a drop foreign key command.
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*
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* @param \Illuminate\Database\Schema\Blueprint $blueprint
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* @param \Illuminate\Support\Fluent $command
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* @return string
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*/
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public function compileDropForeign(Blueprint $blueprint, Fluent $command)
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{
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throw new RuntimeException('This database driver does not support dropping foreign keys.');
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}
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/**
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* Compile the blueprint's added column definitions.
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*
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* @param \Illuminate\Database\Schema\Blueprint $blueprint
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* @return array
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*/
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protected function getColumns(Blueprint $blueprint)
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{
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$columns = [];
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foreach ($blueprint->getAddedColumns() as $column) {
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// Each of the column types has their own compiler functions, which are tasked
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// with turning the column definition into its SQL format for this platform
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// used by the connection. The column's modifiers are compiled and added.
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$sql = $this->wrap($column).' '.$this->getType($column);
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$columns[] = $this->addModifiers($sql, $blueprint, $column);
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}
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return $columns;
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}
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/**
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* Get the SQL for the column data type.
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*
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* @param \Illuminate\Support\Fluent $column
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* @return string
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*/
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protected function getType(Fluent $column)
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{
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return $this->{'type'.ucfirst($column->type)}($column);
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}
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/**
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* Create the column definition for a generated, computed column type.
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*
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* @param \Illuminate\Support\Fluent $column
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* @return void
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*
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* @throws \RuntimeException
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*/
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protected function typeComputed(Fluent $column)
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{
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throw new RuntimeException('This database driver does not support the computed type.');
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}
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/**
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* Add the column modifiers to the definition.
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*
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* @param string $sql
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* @param \Illuminate\Database\Schema\Blueprint $blueprint
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* @param \Illuminate\Support\Fluent $column
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* @return string
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*/
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protected function addModifiers($sql, Blueprint $blueprint, Fluent $column)
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{
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foreach ($this->modifiers as $modifier) {
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if (method_exists($this, $method = "modify{$modifier}")) {
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$sql .= $this->{$method}($blueprint, $column);
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}
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}
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return $sql;
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}
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/**
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* Get the command with a given name if it exists on the blueprint.
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*
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* @param \Illuminate\Database\Schema\Blueprint $blueprint
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* @param string $name
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* @return \Illuminate\Support\Fluent|null
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*/
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protected function getCommandByName(Blueprint $blueprint, $name)
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{
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$commands = $this->getCommandsByName($blueprint, $name);
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if (count($commands) > 0) {
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return reset($commands);
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}
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}
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/**
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* Get all of the commands with a given name.
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*
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* @param \Illuminate\Database\Schema\Blueprint $blueprint
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* @param string $name
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* @return array
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*/
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protected function getCommandsByName(Blueprint $blueprint, $name)
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{
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return array_filter($blueprint->getCommands(), function ($value) use ($name) {
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return $value->name == $name;
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});
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}
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/*
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* Determine if a command with a given name exists on the blueprint.
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*
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* @param \Illuminate\Database\Schema\Blueprint $blueprint
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* @param string $name
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* @return bool
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*/
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protected function hasCommand(Blueprint $blueprint, $name)
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{
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foreach ($blueprint->getCommands() as $command) {
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if ($command->name === $name) {
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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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* Add a prefix to an array of values.
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*
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* @param string $prefix
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* @param array $values
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* @return array
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*/
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public function prefixArray($prefix, array $values)
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{
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return array_map(function ($value) use ($prefix) {
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return $prefix.' '.$value;
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}, $values);
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}
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/**
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* Wrap a table in keyword identifiers.
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*
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* @param mixed $table
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* @return string
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*/
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public function wrapTable($table)
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{
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return parent::wrapTable(
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$table instanceof Blueprint ? $table->getTable() : $table
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);
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}
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/**
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* Wrap a value in keyword identifiers.
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*
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* @param \Illuminate\Support\Fluent|\Illuminate\Contracts\Database\Query\Expression|string $value
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* @param bool $prefixAlias
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* @return string
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*/
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public function wrap($value, $prefixAlias = false)
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{
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return parent::wrap(
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$value instanceof Fluent ? $value->name : $value, $prefixAlias
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);
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}
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/**
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* Format a value so that it can be used in "default" clauses.
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*
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* @param mixed $value
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* @return string
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*/
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protected function getDefaultValue($value)
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{
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if ($value instanceof Expression) {
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return $this->getValue($value);
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}
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if ($value instanceof BackedEnum) {
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return "'{$value->value}'";
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}
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return is_bool($value)
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? "'".(int) $value."'"
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: "'".(string) $value."'";
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}
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/**
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* Get the fluent commands for the grammar.
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*
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* @return array
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*/
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public function getFluentCommands()
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{
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return $this->fluentCommands;
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}
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/**
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* Check if this Grammar supports schema changes wrapped in a transaction.
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*
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* @return bool
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*/
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public function supportsSchemaTransactions()
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{
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return $this->transactions;
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}
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}
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