initial commit

.gitignore

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+node_modules
+.vscode

index.js

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+require('./src/app')

package.json

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+{
+  "name": "nodetest",
+  "version": "1.0.0",
+  "description": "",
+  "main": "index.js",
+  "scripts": {
+    "test": "echo \"Error: no test specified\" && exit 1"
+  },
+  "author": "",
+  "license": "ISC",
+  "dependencies": {
+    "axios": "^0.16.2",
+    "install": "^0.10.1",
+    "knex": "^0.13.0",
+    "moment": "^2.19.1",
+    "npm": "^5.4.2",
+    "pg": "^7.3.0",
+    "pg-hstore": "^2.3.2",
+    "sequelize": "^4.13.8"
+  }
+}

src/app.js

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+const Sequelize = require('sequelize')
+const moment = require('moment')
+const { Student, Credit, Studyright, sequelize } = require('./models')
+const Op = Sequelize.Op;
+
+const studyrightsStartedAt = (date) => {
+  return Studyright.findAll({
+    limit : 200,
+    include: [ { 
+      model: Student,
+       include: [ Credit ]
+    } ],
+    where: { 
+      startdate: {
+        [Op.eq]: new Date(date)
+      }
+    }
+  })
+}
+
+const studentsStartedAtDepartment = (studyrights, dep, startDate) => {
+  const hasNoPreviousStudies = (s) => {
+
+    return true
+  }
+
+  const hasStarted = (s) => {
+    return s.credits.length>0
+  } 
+
+  return studyrights
+          .filter( s => s.highlevelname === dep )
+          .map( s => s.student )
+          .filter( hasStarted )
+          .filter( hasNoPreviousStudies )
+}
+
+
+
+async function main() {
+  try {
+    const BSC_CS = 'Bachelor of Science, Computer Science'
+    const BSC_MATH = 'Bachelor of Science, Mathematics'
+   
+    const startDate = '2005-08-01'
+
+    const studyrights = await studyrightsStartedAt(startDate)
+    
+    const cs = studentsStartedAtDepartment(studyrights, BSC_CS, moment(startDate))
+
+    cs.forEach( s => console.log(s.studentnumber))
+
+    //console.log(studyrights.map(s=>s.student.studentnumber))
+
+  } catch (e) {
+    console.log(e)
+  } 
+  sequelize.close()
+}
+
+main()

src/models/index.js

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+const Sequelize = require('sequelize')
+
+const sequelize = new Sequelize('tkt_oodi', 'tkt_oodi', process.ENV.PW, {
+  host: 'localhost',
+  dialect:'postgres',
+});
+
+
+const Student = sequelize.define('student', 
+  {
+    studentnumber: {
+      primaryKey: true,
+      type: Sequelize.STRING
+    },
+    lastname: { type: Sequelize.STRING },
+    firstnames: { type: Sequelize.STRING },
+    abbreviatedname: { type: Sequelize.STRING },
+    birthdate: { type: Sequelize.DATE },
+    communicationlanguage: { type: Sequelize.STRING },
+    country: { type: Sequelize.STRING },                    
+    creditcount: { type: Sequelize.INTEGER },
+    dateoffirstcredit: { type: Sequelize.DATE },
+    dateoflastcredit: { type: Sequelize.DATE },
+    dateofuniversityenrollment: { type: Sequelize.DATE },
+    gradestudent: { type: Sequelize.STRING },
+    matriculationexamination: { type: Sequelize.STRING },
+    nationalities: { type: Sequelize.STRING },
+    semesterenrollmenttypecode: { type: Sequelize.STRING },
+    sex: { type: Sequelize.STRING },
+    studentstatuscode: { type: Sequelize.INTEGER },    
+  },
+  {
+    tableName: 'student',
+    timestamps: false,  
+  }
+);
+
+const Credit = sequelize.define('credit', 
+  {
+    id: {
+      primaryKey: true,
+      type: Sequelize.STRING
+    },
+    grade: { type: Sequelize.STRING },
+    student_studentnumber: { type: Sequelize.STRING },
+    credits: { type: Sequelize.DOUBLE },
+    ordering: { type: Sequelize.STRING },
+    status: { type: Sequelize.STRING },
+    statuscode: { type: Sequelize.STRING },
+    courseinstance_id: { type: Sequelize.BIGINT },    
+  },
+  {
+    tableName: 'credit',
+    timestamps: false,  
+  }
+);
+
+const Studyright = sequelize.define('studyright', 
+  {
+    studyrightid: { 
+      primaryKey: true,
+      type: Sequelize.BIGINT 
+    },
+    canceldate: { type: Sequelize.DATE },
+    cancelorganisation: { type: Sequelize.STRING },
+    enddate: { type: Sequelize.DATE },
+    extentcode: { type: Sequelize.INTEGER },
+    givendate: { type: Sequelize.DATE },
+    graduated: { type: Sequelize.INTEGER },
+    highlevelname: { type: Sequelize.STRING },
+    prioritycode: { type: Sequelize.INTEGER },
+    startdate: { type: Sequelize.DATE },
+    studystartdate: { type: Sequelize.DATE },
+    organization_code: { type: Sequelize.STRING },
+    student_studentnumber: { type: Sequelize.STRING },
+  },
+  {
+    tableName: 'studyright',
+    timestamps: false,  
+  }
+);
+
+Credit.belongsTo(Student, {foreignKey: 'student_studentnumber', targetKey: 'studentnumber'});
+Student.hasMany(Credit, {foreignKey: 'student_studentnumber', sourceKey: 'studentnumber'});
+
+Studyright.belongsTo(Student, {foreignKey: 'student_studentnumber', targetKey: 'studentnumber'});
+Student.hasMany(Studyright, {foreignKey: 'student_studentnumber', sourceKey: 'studentnumber'});
+
+module.exports = {Student, Credit, Studyright, sequelize}