google-cloud-datastore

问题 I am trying to connect to google bucket to upload a file. StorageOptions.Builder optionsBuilder = StorageOptions.newBuilder(); optionsBuilder.setCredentials(GoogleCredentials.getApplicationDefault()); Storage storage = optionsBuilder.build().getService(); I have provided service account in environment variables and when i looked into optionsBuilder.build() the credentials are added correctly including projectId, credentials etc. but service property is showing null. its giving error for

问题 I have a modular jersey based microservice running on JDK 11. It deploys fine to Google App Engine. The code can be downloaded here (or clone the main project and switch to the 3.1 tag): https://github.com/Leejjon/SimpleJerseyService/releases/tag/3.1 Now I want to add access to the Google Cloud Datastore API (which worked on my previous non modular Java 8 project). So I add the maven dependency: <dependency> <groupId>com.google.cloud</groupId> <artifactId>google-cloud-datastore</artifactId>

问题 Migrating from AppEngine low level Datastore API to objectify 5: reading Entity gets an error. What i see using the Datastore Entity Tool is because the old data keeps "Ifont" as " Blob " instead and should become an " Embedded class " @Entity(name = "Mandant") public class Mandant implements IsSerializable { @Id private Long id; @Index private String nr = ""; private Ifont fontHeader; How do we read this Blob data? 回答1: How did you save the data into a Blob field in the first place? A Blob

问题 I want to use Datastore from Cloud Compute through Java and I am following Getting started with Google Cloud Datastore. My use case is quite standard - read one entity (lookup), modify it and save the new version. I want to do it in a transaction so that if two processes do this, the second one won't overwrite the changes made by the first one. I managed to issue a transaction and it works. However I don't know what would happen if the transaction fails: How to identify a failed transaction?

问题 I have a web application which uses Google's Datastore, and has been running out of memory after enough requests. I have narrowed this down to a Datastore query. A minimum PoC is provided below, a slightly longer version which includes memory measuring is on Github. from google.cloud import datastore from google.oauth2 import service_account def test_datastore(entity_type: str) -> list: creds = service_account.Credentials.from_service_account_file("/path/to/creds") client = datastore.Client

问题 I'm building a blog from start for a homework assignment in Google App Engine in python and I'm using jinja2 to render my html. My problem is that like every blog when an entry is too long; the blog just renders a part of the entry in the main page. I want to do that, when the main page is rendered I took the post from the database and pasted it to jinja. Are there any filters or functions to tell jinja, for example, this string can not be longer than x number? 回答1: Look at docs Jinja2 has

问题 I'm building a blog from start for a homework assignment in Google App Engine in python and I'm using jinja2 to render my html. My problem is that like every blog when an entry is too long; the blog just renders a part of the entry in the main page. I want to do that, when the main page is rendered I took the post from the database and pasted it to jinja. Are there any filters or functions to tell jinja, for example, this string can not be longer than x number? 回答1: Look at docs Jinja2 has

问题 I want to create a user registration with custom usernames. I store the user's username on a user document in Firestore. How can I validate a username already exists in my Users Collection? Maybe someone already have snippet for reactive form validation? 回答1: There is no efficient way to check all documents in a collection for a specific value. You would have to read each document in turn, and check them. That is prohibitive both from a performance and a cost standpoint. What you can instead

来源： https://stackoverflow.com/questions/63510012/it-appears-that-entities-in-datastore-use-their-ancestor-key-as-part-of-their-lo

来源： https://stackoverflow.com/questions/53735485/firestore-and-datastore-in-the-same-gae-project