Node.js 使用dynamoose编写查询时需要帮助吗
我正在使用dynamoDB和dynamoose处理节点js。例如,假设我们有一个表Employees,其中有两个属性Branch和Domain。我有一个给定的分支和域,现在我想获取给定分支或给定域下的所有员工。有人能举一个上述案例的例子吗?这是查询和扫描的代码 代码连接到DynamoDB本地实例 使用的员工架构:-Node.js 使用dynamoose编写查询时需要帮助吗,node.js,amazon-dynamodb,Node.js,Amazon Dynamodb,我正在使用dynamoDB和dynamoose处理节点js。例如,假设我们有一个表Employees,其中有两个属性Branch和Domain。我有一个给定的分支和域,现在我想获取给定分支或给定域下的所有员工。有人能举一个上述案例的例子吗?这是查询和扫描的代码 代码连接到DynamoDB本地实例 使用的员工架构:- var dynamoose = require('dynamoose'); dynamoose.AWS.config.update({ accessKeyId : 'AKID
var dynamoose = require('dynamoose');
dynamoose.AWS.config.update({
accessKeyId : 'AKID',
secretAccessKey : 'SECRET',
region : 'us-east-1'
});
dynamoose.local();
var Schema = dynamoose.Schema;
var Table = dynamoose.Table;
var Employee = dynamoose.model('employee', { branch: String, domain: String });
Employee.get('UK').then(function (data) {
console.log('Get :' + JSON.stringify(data));
});
Employee.query('branch').eq('UK').exec(function (err, data) {
console.log('Query :' + JSON.stringify(data));
});
Employee.scan('domain').eq('Banking').exec(function (err, data) {
console.log('Scan :' + JSON.stringify(data));
});
分支散列键
表中没有排序键
域-是属性
代码:-
var dynamoose = require('dynamoose');
dynamoose.AWS.config.update({
accessKeyId : 'AKID',
secretAccessKey : 'SECRET',
region : 'us-east-1'
});
dynamoose.local();
var Schema = dynamoose.Schema;
var Table = dynamoose.Table;
var Employee = dynamoose.model('employee', { branch: String, domain: String });
Employee.get('UK').then(function (data) {
console.log('Get :' + JSON.stringify(data));
});
Employee.query('branch').eq('UK').exec(function (err, data) {
console.log('Query :' + JSON.stringify(data));
});
Employee.scan('domain').eq('Banking').exec(function (err, data) {
console.log('Scan :' + JSON.stringify(data));
});
解释:-
var dynamoose = require('dynamoose');
dynamoose.AWS.config.update({
accessKeyId : 'AKID',
secretAccessKey : 'SECRET',
region : 'us-east-1'
});
dynamoose.local();
var Schema = dynamoose.Schema;
var Table = dynamoose.Table;
var Employee = dynamoose.model('employee', { branch: String, domain: String });
Employee.get('UK').then(function (data) {
console.log('Get :' + JSON.stringify(data));
});
Employee.query('branch').eq('UK').exec(function (err, data) {
console.log('Query :' + JSON.stringify(data));
});
Employee.scan('domain').eq('Banking').exec(function (err, data) {
console.log('Scan :' + JSON.stringify(data));
});
- Employee.get(..)-通过哈希键获取数据
- Employee.query(..)-根据需要通过哈希键和其他属性获取数据
- Employee.scan(..)-根据非关键属性获取数据
var dynamoose = require('dynamoose');
dynamoose.AWS.config.update({
accessKeyId : 'AKID',
secretAccessKey : 'SECRET',
region : 'us-east-1'
});
dynamoose.local();
var Schema = dynamoose.Schema;
var Table = dynamoose.Table;
var Employee = dynamoose.model('employee', { branch: String, domain: String });
Employee.get('UK').then(function (data) {
console.log('Get :' + JSON.stringify(data));
});
Employee.query('branch').eq('UK').exec(function (err, data) {
console.log('Query :' + JSON.stringify(data));
});
Employee.scan('domain').eq('Banking').exec(function (err, data) {
console.log('Scan :' + JSON.stringify(data));
});
分支散列键
表中没有排序键
域-是属性
代码:-
var dynamoose = require('dynamoose');
dynamoose.AWS.config.update({
accessKeyId : 'AKID',
secretAccessKey : 'SECRET',
region : 'us-east-1'
});
dynamoose.local();
var Schema = dynamoose.Schema;
var Table = dynamoose.Table;
var Employee = dynamoose.model('employee', { branch: String, domain: String });
Employee.get('UK').then(function (data) {
console.log('Get :' + JSON.stringify(data));
});
Employee.query('branch').eq('UK').exec(function (err, data) {
console.log('Query :' + JSON.stringify(data));
});
Employee.scan('domain').eq('Banking').exec(function (err, data) {
console.log('Scan :' + JSON.stringify(data));
});
解释:-
var dynamoose = require('dynamoose');
dynamoose.AWS.config.update({
accessKeyId : 'AKID',
secretAccessKey : 'SECRET',
region : 'us-east-1'
});
dynamoose.local();
var Schema = dynamoose.Schema;
var Table = dynamoose.Table;
var Employee = dynamoose.model('employee', { branch: String, domain: String });
Employee.get('UK').then(function (data) {
console.log('Get :' + JSON.stringify(data));
});
Employee.query('branch').eq('UK').exec(function (err, data) {
console.log('Query :' + JSON.stringify(data));
});
Employee.scan('domain').eq('Banking').exec(function (err, data) {
console.log('Scan :' + JSON.stringify(data));
});
- Employee.get(..)-通过哈希键获取数据
- Employee.query(..)-根据需要通过哈希键和其他属性获取数据
- Employee.scan(..)-根据非关键属性获取数据