Question

我有数据传递给函数，我需要检查数组中的每个对象并返回所有的promise，如何将相同的数据传递给链接，以便我可以用于处理。每个承诺都是调用数据库来验证和插入数据。

1-如何将event传递给所有承诺以进行进一步处理？ 2-如何检查是否所有事件处理都已完成，然后下一个func可以调用？

Ctrl.js

       var data = [{
                activityId: '1tgktxy',
                variables: {
                    event: [Object]
                },
                priority: 0
            },
            {
                activityId: '7tl07',
                variables: {
                    caseIdFound: [{
                        type: Boolean,
                        value: true
                    }],
                    event: [Object]
                },
                priority: 0
            },
            {
                activityId: '7tl07',
                variables: {
                    caseIdFound: [{
                        type: Boolean,
                        value: true
                    }],
                    event: [Object]
                },
                priority: 0
            },
        ]

        function mainFunction(data) {
            return Promise.all(data.map(function(element) {
                    var event = JSON.parse(element.variables.event.value);
                    return checkTicketNumber(event);
                })
                .then(function() {
                    return insertDataToLog();
                }).
                .then(function() {
                    return insertDataToResult();
                })
                .then(function() {
                    console.log('All task events processing is done');
                   // anotherFunction();
                }).




            }

            var checkTicketNumber = new Promise(
                function(resolve, reject) {
                    checkTicketCall(ticketNumber, function(err, response) {
                        resolve();
                    }):
                });

           // if caseIdFound is true then i want invoke thise promise

            var insertDataToLog = new Promise(
                function(resolve, reject) {
                    InsertCall(event.body, function(err, response) {
                        resolve();
                    }):
                });

          // if caseIdFound is true then i want invoke thise promise
            var insertDatatoResult = new Promise(
                function(resolve, reject) {
                    InsertCall(event.body, function(err, response) {
                        resolve();
                    }):
                });

mainFunction(data);

Answer 1

您可以使用参数来定义解析函数。

实施例

var insertDataToLog = new Promise(
                function(resolve, reject) {
                    InsertCall(event.body, function(err, response) {
                        resolve({event: event, response: response});
                    }):
                });

然后你可以得到解决的值;

...().then(function(resolveData) {
           console.log(resolveData); // resolveData is { event: event, response: response }
           return insertDataToLog();
      })

当你必须为所有Promises使用相同的数据时，promises链接如何工作？

1 个答案: