如何从 Google Cloud Datastore 中查找在 PHP 中具有数值键的实体？

Question

The following code was run on Google App Engine Flex env.

For example: the key is Key(Task,"t12") . I can look it up in PHP using the following syntax:

$key = $datastore->key('Task', "t12");
$task = $datastore->lookup($key);

However, if the key is Key(Task, 12) . I cannot look it up with the syntax:

$key = $datastore->key('Task', 12);
$task = $datastore->lookup($key);

Or even

$key = $datastore->key('Task', intval("12"));
$task = $datastore->lookup($key);

I tried the query again and it worked well for the first entity (which was created in code). However, for the 3 following entities (which was created using the console) only the last entity worked. I recognized there a different in the first column.

Answer 1

According to official documentation

Assigning identifiers In addition to a kind, each entity has an identifier, assigned when the entity is created. Because it is part of the entity's key, the identifier is associated permanently with the entity and cannot be changed. It can be assigned in either of two ways:

1.Your application can specify its own key name string for the entity.

2.You can have Firestore in Datastore mode automatically assign the entity an integer numeric ID.

3.Assigning your own numeric ID which is integer

Therefore I used case 3, and you used case 1. In case 1 you should search for a string because you set a key name when you inserted using console, which is of type string. When I inserted an entry using client libraries I used my own numeric ID, which is of type int.

name=12 and name="12" are two strings which are not the same