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這裏是我想要做的事:製作一個異步循環中node.js中使用SQL
- 開始一個循環(10X)
- 選擇上的SQL返回1個寄存器(選擇頂部1,其中「跑步」爲null)
- SQL更新「運行」狀態爲「運行」
- 如果記錄是空的,我訪問的API,並得到一些數據
- 結果對初始SQL記錄更新(集running ='ok')
- 結束循環(重新開始)
問題是,node.js不等待重新開始,它在同一時間完成所有操作。這樣,「跑步」總是空。
var express = require('express');
var app = express();
var c_MyApi = require('./controller/call_MyApi');
var mongo = require('./controller/crud_mongo');
var c_email = require('./controller/api_email_verify');
var c_sql = require('./controller/consulta_sql');
var MyLink = '',
id = 0;
for(var i = 0 ; i < 10 ; i++){
c_sql.busca().then(function(res) {
MyLink = res[0].MyLink;
id = res[0].id;
c_sql.marca(id).then(
c_MyApi.busca(MyLink, function(a) {
if (a == 0) {
c_sql.atualiza(id, 'sem_email', 's/e');
}
if (a == 1) {
c_sql.atualiza(id, 'link_errado', 'l/e');
} else {
for (var i = 0; i < a.length; i++) {
var email = a[i].address;
c_email.busca(email, function(e_valid) {
c_sql.atualiza(id, email, e_valid)
})
}
}
})
)
})
}
}
//consulta_sql.js
var sql = require("seriate");
var search = function() {
var exec = 'select top 1 MyLink, id from sys_robo_fila where done is null';
sql.setDefaultConfig(config);
return sql.execute({
query: exec
});
}
var usado = function(id) {
var exec = "update sys_robo_fila set done = 'r' where id = " + id + "";
sql.setDefaultConfig(config);
return sql.execute({
query: exec
});
}
var update = function(id, email, valid) {
var exec = "update sys_robo_fila set email = '" + email + "' , validacao = '" + valid + "' , done = 'ok' where id = " + id + "";
sql.setDefaultConfig(config);
return sql.execute({
query: exec
});
}
module.exports = {
busca: search,
atualiza: update,
marca: usado
}
任何消耗?