我的Firestore结构如下所示：
-(coll)users
-(doc)uniqueID
name
email
(coll)clients
-(doc)uniqueID
clientName
clientEmail
我想要实现的目标如下：
我尝试根据documentation：
使用以下代码进行查询 clientsCollection = db.collection(FIRESTORE_COLLECTION_USERS)
.document(mUid)
.collection(FIRESTORE_COLLECTION_CLIENTS);
clientsCollection
.get()
.addOnCompleteListener(new OnCompleteListener<QuerySnapshot>() {
@Override
public void onComplete(@NonNull Task<QuerySnapshot> task) {
if (task.isSuccessful()){
for (DocumentSnapshot document: task.getResult()){
Log.d(LOG_TAG, document.getId() + " => " + document.getData());
}
} else {
Log.d(LOG_TAG, "error getting documents: ", task.getException());
}
}
});
我得到以下RuntimeException：
java.lang.NullPointerException: Provided document path must not be null.
即使客户端集合中存在一些由唯一的uid命名的文档，我也会得到这个。
感谢你能给我的任何线索！ ：）
答案 0 :(得分：1)
运行第一个语句时，错误消息指示// tests/AppBundle/Repository/BotsDbTest.php
<?php
use Symfony\Bundle\FrameworkBundle\Test\KernelTestCase;
use Symfony\Component\Finder\Finder;
use Symfony\Component\Config\FileLocator;
use Symfony\Component\Yaml\Parser;
class BotsDbTest extends KernelTestCase
{
private $doctr;
private $db_cred;
private $db;
/**
* {@inheritDoc}
*/
protected function setUp()
{
$kernel = self::bootKernel();
$this->doctr = $kernel->getContainer()
->get('doctrine')
->getManager();
// for tests with loaded content
$this->db = new \AppBundle\Wiks\BotsDb();
// https://symfony.com/doc/current/bundles/extension.html
// get DB credientals from "parameters_test.yml":
$configDirectories = array( 'app/config' );
$locator = new FileLocator( $configDirectories );
$yamlUserFiles = $locator->locate( 'parameters_test.yml', null, false );
// https://davidegan.me/parse-yaml-in-php-using-symfony-yaml/
$yaml = new Parser();
$yaml_array = $yaml->parse( file_get_contents( $yamlUserFiles['0'] ) );
// needen DB is the second in Symfony - as database2 in file "parameters_test.yml":
$prefix_db = 'database2';
// looking for all keys with suffix: eq: 'database2_host'
$needed_sufix = [ 'host', 'port', 'name', 'user', 'password' ];
$this->db_cred = array();
foreach ( $yaml_array[ 'parameters' ] as $key => $value ) {
if ( strpos( $key, $prefix_db ) !== false ) {
foreach ( $needed_sufix as $needed_key ) {
if ( strpos( $key, $needed_key ) !== false ) {
$this->db_cred[ $needed_key ] = $value;
}
}
}
}
if ( count( $this->db_cred ) == count( $needed_sufix ) ) {
// check is all found
/*Array (
[host] => 127.0.0.1
[port] =>
[name] => db_name
[user] => user_name
[password] => ***
) */
$finder = new Finder();
// find and put into mysql all files as prepared content to tests
$finder->files()->name('*.sql');
foreach ( $finder->in( array( 'tests/dbcontent' ) ) as $file ) {
$shell_command = 'mysql --user='.$this->db_cred['user'].' --password='.$this->db_cred['password'];
$shell_command .= ' '.$this->db_cred['name'].'< '.$file->getRealPath();
shell_exec( $shell_command );
}
}
}
/**
* {@inheritDoc}
*/
protected function tearDown()
{
parent::tearDown();
// remoove DB content ( all tabels ):
$shell_command = 'mysqldump --user='.$this->db_cred['user'].' --password='.$this->db_cred['password'].' ';
$shell_command .= '--add-drop-table --no-data '.$this->db_cred['name'].' | ';
$shell_command .= 'grep -e \'^DROP \| FOREIGN_KEY_CHECKS\' | ';
$shell_command .= 'mysql --user='.$this->db_cred['user'].' --password='.$this->db_cred['password'].' '.$this->db_cred['name'];
shell_exec( $shell_command );
$this->doctr->close();
$this->doctr = null; // avoid memory leaks
}
/** tests, tests, tests...
*
*/
public function test_getBots()
{
$res = $this->db->getBots( $this->doctr );
$this->assertEquals(5, count( $res ));
[...]
为mUid。这很可能意味着您在用户登录之前运行此代码。
确保您仅在用户登录后调用此代码，例如来自null：
AuthStateListener.onAuthStateChanged()