atakangah

router.post('/complete-student-course', async (req, res) => {

        let {studentId, courseId} = req.body;

atakangah

 try {
        
          let student = await Students.find({ 'studentId': studentId }).exec();

          /*
           * After finding the student with the provided studentId,
           * Use O(n) algorithm to find the course to complete for student
           * It is unlikely for any student to have more than 5 courses in its course list at aytime
           * Therefore, O(n) algorithm is ok
           */

atakangah

// Update student data with new data without the deleted course
              try {

                  let ccompleteRes = await Students.updateOne({ 'studentId': studentId }, student[0], { upsert: true }).exec();

                /*
                 * NOTICE THE CALL TO THIS FUNCTION
                 * I DID NOT USE AWAIT
                 */
                  updateCompletedStudents(courseId, student, res);

atakangah

async function updateCompletedStudents(courseId, student, res) {

      /*
       * Substract -1 from @continuingStudents on system
       */
      
      try {
       
          //Get current system data
          let system  = await System.find({ 'systemId': SYSTEM_ID }).exec();

atakangah

router.post('/complete-student-course', async (req, res) => {

        let {studentId, courseId} = req.body;

atakangah

async function updateCompletedStudents(courseId, student, res) {

      /*
       * Substract -1 from @continuingStudents on system
       */

atakangah

// Update student data with new data without the deleted course
              try {

                  let ccompleteRes = await Students.updateOne({ 'studentId': studentId }, student[0], { upsert: true }).exec();

atakangah

          try {
            
              //Update new system status
              await System.updateOne({ 'systemId': SYSTEM_ID }, system[0], { upsert: true }).exec();

atakangah

//Update new system status
let updateResult = await System.updateOne({ 'systemId': SYSTEM_ID }, system[0], { upsert: true }).exec();

console.log('Update Result:', updateResult);

atakangah

Hexadecimal color code for transparency

How to set transparency with hex value ?

For example, you want to set 40% alpha transparence to #000000 (black color), you need to add 66 like this #66000000.

Download This sample on Google Play Store