Question

我可以将数据添加到Firebase上的Firestore中。但是我无法从中获取数据。

有人可以给我榜样和良好的配置吗？

错误：

无法调用RNFirebaseFirestore.collection获取空

Build.gradle on Project

buildscript {
    repositories {
        jcenter()
        google()
    }
    dependencies {
        classpath 'com.android.tools.build:gradle:3.1.3'
        classpath 'com.google.gms:google-services:4.0.1'

        // NOTE: Do not place your application dependencies here; they belong
        // in the individual module build.gradle files
    }
}

allprojects {
    repositories {
        mavenLocal()
        google()
        jcenter()
        maven {
            // All of React Native (JS, Obj-C sources, Android binaries) is installed from npm
            url "$rootDir/../node_modules/react-native/android"
        }

        maven {
            url 'https://maven.google.com'
        }
    }
}

在应用程序上构建.gradle

dependencies {
    implementation(project(':react-native-firebase')){
        transitive = false
    }
    implementation fileTree(dir: "libs", include: ["*.jar"])
    implementation "com.android.support:appcompat-v7:23.0.1"
    implementation "com.facebook.react:react-native:+"  // From node_modules
    implementation 'com.google.firebase:firebase-core:16.0.1'
    implementation "com.google.android.gms:play-services-base:15.0.1"
    implementation "com.google.firebase:firebase-firestore:15.0.0"
}

apply plugin: 'com.google.gms.google-services'

我使用的版本：

"dependencies": {
    "firebase": "^5.3.0",
    "react-native": "0.55.4",
    "react-native-firebase": "^4.3.8",

这是我获取数据的代码

firebase.firestore().collection("Product").get().then(function(querySnapshot) {
			querySnapshot.forEach(function(doc) {
				console.log(doc.id, " => ", doc.data());
			});
		});

预先感谢

Answer 1

尝试以下代码：-

this.dbRef = firebase.database().ref("Product");

this.dbRef.once(
    "value",
    snapshot => {
console.log(snapshot.key, "Response: " + snapshot.val());

},
    errorObject => {
      console.log("The read failed: " + errorObject.code);
    }
  );

获取数据Firebase Firestore时反应本机错误

1 个答案: