datastore

问题 Sorry if this is a simple question, but I just can't figure out what I'm supposed to do and I think I'm a bit out of my depth here. I want to send data from an Android Application to my application running on Google App Engine. From there the data must be written to the Datastore. My data will mostly be in the form of objects, and I am working in Java. I came across the following question: how-can-i-connect-a-google-app-engine-application-with-my-android I think I understand what has to

问题 Sorry if this is a simple question, but I just can't figure out what I'm supposed to do and I think I'm a bit out of my depth here. I want to send data from an Android Application to my application running on Google App Engine. From there the data must be written to the Datastore. My data will mostly be in the form of objects, and I am working in Java. I came across the following question: how-can-i-connect-a-google-app-engine-application-with-my-android I think I understand what has to

问题 Sorry if this is a simple question, but I just can't figure out what I'm supposed to do and I think I'm a bit out of my depth here. I want to send data from an Android Application to my application running on Google App Engine. From there the data must be written to the Datastore. My data will mostly be in the form of objects, and I am working in Java. I came across the following question: how-can-i-connect-a-google-app-engine-application-with-my-android I think I understand what has to

问题 I am building an App based on Node.js running on Heroku. The app uses a JSON file which at the moment is being pushed with the rest of the app, and we are reading and writing to it like so: var channelsList = require("./JSON/channels.json"); ... fs.writeFile("JSON/channels.json", JSON.stringify(channelsList), onCleaned); This has worked for now for the prototype, but I know that we need to use a data store or the changes won't persist when Dyno's sleep or I push changes. I have read that

问题 I am trying to implement Jetpack Datastore in my project. I was using the apha-01 version and the code was working fine. Then I saw in the Gradle file that there is a new version so I updated it to alpha-03 . After starting my app, I encountered another issue. I found that Proto library is not found in the alpha-03 version so I rolled back to version alpha-01 . Also, I tried alpha-02 . Since then I am having the error below: Process: com.montymobile.sands, PID: 19928 java.io.IOException:

来源： https://stackoverflow.com/questions/58974389/how-to-convert-datastore-backup-to-json-including-maps-and-arrays

问题 I have a database in Google Datastore. I don't know how to use cloud functions, but i want to trigger an event after a creation or an update. Unfortunately the documentation is light on the subject : https://cloud.google.com/appengine/docs/standard/java/datastore/callbacks I don't know how i could use @PostPut to trigger an event as soon as a line is created or updated. Does anyone have a tutorial which a basic example ? thank you 回答1: Dan MacGrath provided an answer to a similar request

问题 I want to pass a list of variables to saveRDS() to save their values, but instead it saves their names: variables <- c("A", "B", "C") saveRDS(variables, "file.R") it saves the single vector "variables". I also tried: save(variables, "file.RData") with no success 回答1: You need to use the list argument of the save function. EG: var1 = "foo" var2 = 2 var3 = list(a="abc", z="xyz") ls() save(list=c("var1", "var2", "var3"), file="myvariables.RData") rm(list=ls()) ls() load("myvariables.RData") ls()

问题 I want to retrieve a table (with all rows) by name. I want to HTTP request using something like this on the body {"table": user} . Tried this code without success: 'use strict'; const {Datastore} = require('@google-cloud/datastore'); // Instantiates a client const datastore = new Datastore(); exports.getUsers = (req, res) => { //Get List const query = this.datastore.createQuery('users'); this.datastore.runQuery(query).then(results => { const customers = results[0]; console.log('User:');

问题 Here is a method, which retrieves all orders for given order id of the user func (r *DatastoreRepository) FindOrders(ctx context.Context, userID string, orderIDs []string) ([]*domain.Order, interface{}) { keys := make([]*datastore.Key, len(orderIDs)) for i, orderID := range orderIDs { key := datastore.NameKey(kindOrder, orderID, nil) key.Namespace = userID keys[i] = key } orders := make([]*domain.Order, len(keys)) multiErrors := r.client.GetMulti(ctx, keys, orders) return orders, multiErrors