Multiple tables with node mysql-model?












1














I'm working on a project where I use mysql-model and I don't really understand how models work when we have multiple tables.



I have some code on my model user.js:



var mysqlcon = require('../models/db_connexion');

var User_model = mysqlcon.extend({
tableName: "users"
});

var log_user = new User_model();


Then a function to find the user's role:



module.exports.findUserRole = function(userId,callback){
let findUserRoleId = "SELECT role_id FROM users WHERE id = "+userId;

log_user.query(findUserRoleId,function(err,rows,fields){
let role_id = rows[0].role_id;
let findRolesInfo = "SELECT role_name,role_power FROM roles WHERE role_id = " + role_id;
log_user.query(findRolesInfo,callback)
})


And when I call this function, it returns me what I want, but I don't understand why.



My User_model isn't normally using only the table "users" ? So why can I also access to the table "roles" ?



I've searched on the npm documentation and googled it, but didn't found anything, or I missed it.



Thanks for your explanation.



And sorry if I missed something with the presentation, this is my first post.










share|improve this question





























    1














    I'm working on a project where I use mysql-model and I don't really understand how models work when we have multiple tables.



    I have some code on my model user.js:



    var mysqlcon = require('../models/db_connexion');

    var User_model = mysqlcon.extend({
    tableName: "users"
    });

    var log_user = new User_model();


    Then a function to find the user's role:



    module.exports.findUserRole = function(userId,callback){
    let findUserRoleId = "SELECT role_id FROM users WHERE id = "+userId;

    log_user.query(findUserRoleId,function(err,rows,fields){
    let role_id = rows[0].role_id;
    let findRolesInfo = "SELECT role_name,role_power FROM roles WHERE role_id = " + role_id;
    log_user.query(findRolesInfo,callback)
    })


    And when I call this function, it returns me what I want, but I don't understand why.



    My User_model isn't normally using only the table "users" ? So why can I also access to the table "roles" ?



    I've searched on the npm documentation and googled it, but didn't found anything, or I missed it.



    Thanks for your explanation.



    And sorry if I missed something with the presentation, this is my first post.










    share|improve this question



























      1












      1








      1







      I'm working on a project where I use mysql-model and I don't really understand how models work when we have multiple tables.



      I have some code on my model user.js:



      var mysqlcon = require('../models/db_connexion');

      var User_model = mysqlcon.extend({
      tableName: "users"
      });

      var log_user = new User_model();


      Then a function to find the user's role:



      module.exports.findUserRole = function(userId,callback){
      let findUserRoleId = "SELECT role_id FROM users WHERE id = "+userId;

      log_user.query(findUserRoleId,function(err,rows,fields){
      let role_id = rows[0].role_id;
      let findRolesInfo = "SELECT role_name,role_power FROM roles WHERE role_id = " + role_id;
      log_user.query(findRolesInfo,callback)
      })


      And when I call this function, it returns me what I want, but I don't understand why.



      My User_model isn't normally using only the table "users" ? So why can I also access to the table "roles" ?



      I've searched on the npm documentation and googled it, but didn't found anything, or I missed it.



      Thanks for your explanation.



      And sorry if I missed something with the presentation, this is my first post.










      share|improve this question















      I'm working on a project where I use mysql-model and I don't really understand how models work when we have multiple tables.



      I have some code on my model user.js:



      var mysqlcon = require('../models/db_connexion');

      var User_model = mysqlcon.extend({
      tableName: "users"
      });

      var log_user = new User_model();


      Then a function to find the user's role:



      module.exports.findUserRole = function(userId,callback){
      let findUserRoleId = "SELECT role_id FROM users WHERE id = "+userId;

      log_user.query(findUserRoleId,function(err,rows,fields){
      let role_id = rows[0].role_id;
      let findRolesInfo = "SELECT role_name,role_power FROM roles WHERE role_id = " + role_id;
      log_user.query(findRolesInfo,callback)
      })


      And when I call this function, it returns me what I want, but I don't understand why.



      My User_model isn't normally using only the table "users" ? So why can I also access to the table "roles" ?



      I've searched on the npm documentation and googled it, but didn't found anything, or I missed it.



      Thanks for your explanation.



      And sorry if I missed something with the presentation, this is my first post.







      mysql node.js model






      share|improve this question















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      edited Nov 28 '18 at 12:44









      mihai

      23.4k73968




      23.4k73968










      asked Nov 21 '18 at 12:53









      Ghostmoonk

      62




      62





























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