在我的应用程序中，我在测试期间使用自定义类来复制表。此类使用_test后缀创建新表，并告诉eloquent使用它们。但是当我处理“多对多”关系时，我还需要指定数据透视表名称。是否可以在运行时应用程序期间更改数据透视表？
答案 0 :(得分：0)
如果我已正确理解您的问题，那么您希望能够动态更改多对多关系中的表格。
请注意belongsToMany关系的源代码：
┌─────────┬───────────┬───────────────────────────────────────────┐
│ Name │ Numeric │ Description │
│ │ Value │ │
├─────────┼───────────┼───────────────────────────────────────────┤
│ S_IRWXU │ 0700 │ Read, write, execute/search by owner. │
├─────────┼───────────┼───────────────────────────────────────────┤
│ S_IRUSR │ 0400 │ Read permission, owner. │
├─────────┼───────────┼───────────────────────────────────────────┤
│ S_IWUSR │ 0200 │ Write permission, owner. │
├─────────┼───────────┼───────────────────────────────────────────┤
│ S_IXUSR │ 0100 │ Execute/search permission, owner. │
├─────────┼───────────┼───────────────────────────────────────────┤
│ S_IRWXG │ 070 │ Read, write, execute/search by group. │
├─────────┼───────────┼───────────────────────────────────────────┤
│ S_IRGRP │ 040 │ Read permission, group. │
├─────────┼───────────┼───────────────────────────────────────────┤
│ S_IWGRP │ 020 │ Write permission, group. │
├─────────┼───────────┼───────────────────────────────────────────┤
│ S_IXGRP │ 010 │ Execute/search permission, group. │
├─────────┼───────────┼───────────────────────────────────────────┤
│ S_IRWXO │ 07 │ Read, write, execute/search by others. │
├─────────┼───────────┼───────────────────────────────────────────┤
│ S_IROTH │ 04 │ Read permission, others. │
├─────────┼───────────┼───────────────────────────────────────────┤
│ S_IWOTH │ 02 │ Write permission, others. │
├─────────┼───────────┼───────────────────────────────────────────┤
│ S_IXOTH │ 01 │ Execute/search permission, others. │
├─────────┼───────────┼───────────────────────────────────────────┤
│ S_ISUID │ 04000 │ Set-user-ID on execution. │
├─────────┼───────────┼───────────────────────────────────────────┤
│ S_ISGID │ 02000 │ Set-group-ID on execution. │
├─────────┼───────────┼───────────────────────────────────────────┤
│ S_ISVTX │ 01000 │ On directories, restricted deletion flag. │
└─────────┴───────────┴───────────────────────────────────────────┘
你可以在那里定义表格。因此，我建议您执行以下操作:(考虑public function belongsToMany($related, $table = null, $foreignKey = null, $relatedKey = null, $relation = null)
{
// If no relationship name was passed, we will pull backtraces to get the
// name of the calling function. We will use that function name as the
// title of this relation since that is a great convention to apply.
if (is_null($relation)) {
$relation = $this->guessBelongsToManyRelation();
}
// First, we'll need to determine the foreign key and "other key" for the
// relationship. Once we have determined the keys we'll make the query
// instances as well as the relationship instances we need for this.
$instance = $this->newRelatedInstance($related);
$foreignKey = $foreignKey ?: $this->getForeignKey();
$relatedKey = $relatedKey ?: $instance->getForeignKey();
// If no table name was provided, we can guess it by concatenating the two
// models using underscores in alphabetical order. The two model names
// are transformed to snake case from their default CamelCase also.
if (is_null($table)) {
$table = $this->joiningTable($related);
}
return new BelongsToMany(
$instance->newQuery(), $this, $table, $foreignKey, $relatedKey, $relation
);
}
和User模型之间的多对多关系）
Company并对公司模型执行相同操作 我从未测试过这个，但基本上它应该可以工作。