get next Row when importing file CSV with grails - mysql

Question

i am trying to import file CSV like this image..
this image means..
when i import this file..line 1 with read and save in to Table SeniorHighSchool
then it will get :
name : Alexander
age : 15
muchcourse : 3
after that i want make a condition, When "muchcourse is filled" it will read the next row...
example :
at this case, the "muchcourse" is "3", then "look at the image"..row 2,3,4 (3 lines)will inserted to other table .. because the "muchcourse" is "3"
this is my coding what i have tried .
def upload = {
withForm{
def f = request.getFile('filecsv')
def orifilename = f.getOriginalFilename()
def homeDir = new File(System.getProperty("user.home"))
def homeurl = "Documents/Uploads/"
File fileDest = new File(homeDir,homeurl+orifilename)
f.transferTo(fileDest)
request.getFile(new File(fileDest)).InputStream.splitEachLine(',') {fields ->
def student= new SeniorHighSchool(
name: fields[0].trim(),
age: fields[1].trim(),
muchcourse: fields[2].trim()
)
if (student.hasErrors() || student.save(flush: true) == null)
{
log.error("Could not import domainObject ${student.errors}")
}
}
redirect(action:"list")
}
}
i confused to make a condition..
def upload = {
withForm{
def f = request.getFile('filecsv')
def orifilename = f.getOriginalFilename()
def homeDir = new File(System.getProperty("user.home"))
def homeurl = "Documents/Uploads/"
File fileDest = new File(homeDir,homeurl+orifilename)
f.transferTo(fileDest)
request.getFile(new File(fileDest)).InputStream.splitEachLine(',') {fields ->
def student= new SeniorHighSchool(
name: fields[0].trim(),
age: fields[1].trim(),
muchcourse: fields[2].trim()
)
if (student.hasErrors() || student.save(flush: true) == null)
{
log.error("Could not import domainObject ${student.errors}")
}
if(fields[2]) {
def score = new Score(
course: //the problem at this line..how?
//it will insert 3 times then back to the row 5 to insert into "Student" again
)
}
}
redirect(action:"list")
}
}

Answer 1

if(fields.size()>2){
store 3 values in one table(student)
}
else{
store 2 values in another table(score)
}
If muchcourse field is occured then fields size is 3 then save three data in one table. otherwise size is 2 then save that two data in another table.I think it will solve your problem.

Answer 2

#th3morg like thiss?
request.getFile(new File(fileDest)).InputStream.splitEachLine(',') {fields ->
if(fields.size()>2){
def student= new SeniorHighSchool(
name: fields[0].trim(),
age: fields[1].trim(),
muchcourse: fields[2].trim()
)
}
else{
def score = new Score(
course:fields[0].trim(),
score:fields[1].trim()
)
}
}

Answer 3

If the class SeniorHighStudent "static hasMany = [scores: Score]" then the following should do the trick:
def currentStudent
request.getFile(new File(fileDest)).InputStream.splitEachLine(',') {fields ->
if(fields.size()>2){
if(currentStudent){
/*we've found a new student, so save the previous one*/
currentStudent.save()
}
currentStudent = new SeniorHighSchool(
name: fields[0].trim(),
age: fields[1].trim(),
muchcourse: fields[2].trim()
)
}
else{
/*add the score to the currentStudent's scores*/
currentStudent.addToScores(new Score(
course:fields[0].trim(),
score:fields[1].trim()
))
}
}
/*when the loop is done, save the last student because it hasn't been saved yet*/
currentStudent.save()