strongloop中如何调用存储过程

Question

我正在使用 MySQL 和 strongloop，我有一个存储过程来交换数据

swap_XYZ('<old_abc>', '<new_new>')

我无法在文档中找到任何调用存储过程的示例。如何调用这个存储过程？提前致谢。

Answer 1

参考这个link。 dataSource.connector.execute(sql, 参数, cb);或 dataSource.connector.query(sql, 参数, cb);

https://docs.strongloop.com/display/public/LB/Database+connectors https://docs.strongloop.com/display/public/LB/Executing+native+SQL

 module.exports = function(DemoModel) {
    var server = require('../../server/server');
      var ds = server.dataSources.MySQL;

    DemoModel.list = function(optionalparam, cb) {  


      var sql = 'select * from DemoModel';
      ds.connector.execute(sql, function(err, data)
      {
      if(err) return err;
      console.log(err);
      console.log("data",data);
        cb(null, data);
      });

    }

    DemoModel.remoteMethod(
        'list', 
        {
          accepts: {arg: 'param', type: 'string'},
          returns: {arg: 'result', type: 'object'},
          http: {path: '/list', verb: 'get'}
        }
    );


    };

Answer 2

module.exports = function (ABCModel) {
 var ds = app.dataSources.dsMySQL;

  ABCModel.swap = function (old_abc, new_abc, cb) {

    var sql = "CALL `swap_XYZ`('" + old_abc + "','" + new_abc + "');";

    ds.connector.query(sql, function (err, data) {
      if (err) {
        console.log("Error:", err);
      }
      cb(null, data);
      console.log("data:", data);
    });
  }

  ABCModel.remoteMethod(
    'swap',
    {
      accepts: [
        {arg: 'old_abc', type: 'string'},
        {arg: 'new_abc', type: 'string'}
      ],
      returns: {arg: 'result', type: 'object'},
      http: {path: '/swap', verb: 'post'}
    }
  );
};

Answer 3

终于调用存储过程成功了..

首先，我们需要像 Riaz 一样定义 app kather var app = require('../../server/server');

但是 app.dataSources.MySQL 和 app.dataSources.dsMySQL 都不适合我。我的环回版本是 loopback@3.17.1，对我来说正确的属性名称是 app.dataSources.mysql;

然后确保您的数据库用户帐户具有调用存储过程的权限：

Granting Privileges on Functions/Procedures: While using functions and procedures, the Grant statement can be used to grant users the ability to execute the functions and procedures in MySQL. Granting Execute Privilege: Execute privilege gives the ability to execute a function or procedure.

Syntax:

GRANT EXECUTE ON [ PROCEDURE | FUNCTION ] object TO user;

引用自：https://www.geeksforgeeks.org/mysql-grant-revoke-privileges/

Answer 4

使用node.js

调用PL/SQL存储过程

假设程序的名称是getCountryName，它有一个输入参数和一个输出参数。

var executeProcedure = function () {
        var procedureName = "CALL GETCOUNTRYNAME(:inputVal,:outVal)";
        var oracledb = require('oracledb');
        oracledb.maxRows = 1;
        // oracledb.fetchAsString = [oracledb.CLOB];
        oracledb.getConnection(
            {
                user: 'user',
                password: 'password',
                connectString: "connectString"
            },
            function (err, connection) {
                if (err) {
                    console.error(err);

                    return;
                }
                connection.execute(
                    procedureName,
                    {
                        outVal: {
                            type: oracledb.STRING,
                            dir: oracledb.BIND_OUT
                        },
                        inputVal: {
                            type: oracledb.STRING,
                            dir: oracledb.BIND_IN,
                            val: 'IN'
                        }
                    },

                    function (err, result) {
                        if (err) {
                            console.error(err);

                            return;
                        }
                       console(result)
                    });
            });
};

更多详情

https://github.com/oracle/node-oracledb/blob/master/doc/api.md#queryinglobs https://dzone.com/articles/plsql-record-types-and-the-nodejs-driver

https://github.com/oracle/node-oracledb/blob/master/examples/example.js

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