Trigger before insert, update before, does not work when I import a csv file

Question

I have a trigger before insert, update before, but it does not work when I import a csv file. But if I edit and save the record it works. Any idea?

Trigger updateContatoPonto on Ponto__c (before insert, before update) {

Set <Decimal> receberInscricaoNumero = new Set <Decimal> ();

for(Ponto__c pontos : trigger.New)
{
    receberInscricaoNumero.add(pontos.Inscricao_Numero__c);
    system.debug(receberInscricaoNumero);
}

Map <Decimal, Contact> matchingcontactsMap = new Map <Decimal, Contact> ();

for (Contact contacts : [Select Id, Inscricao_Numero__c From Contact Where Inscricao_Numero__c IN :receberInscricaoNumero])
{
    matchingcontactsMap.put(contacts.Inscricao_Numero__c, contacts);
}

List <Ponto__c> receivablesToUpdate = new List <Ponto__c> ();
for(Ponto__c pontos : trigger.New)
{
    if (matchingcontactsMap.get(pontos.Inscricao_Numero__c) != null)
    {
       pontos.Contato__c = matchingcontactsMap.get(pontos.Inscricao_Numero__c).Id;
       system.debug(matchingcontactsMap);
    } 
    else {
            pontos.Contato__c = null;
        }
} 
update receivablesToUpdate;
}

If I insert records in Developer Console, works too;

Example,

List<Ponto__c> testpontoList = new List<Ponto__c>();        
for(integer i=122;i<125;i++){
    testpontoList.add(new ponto__c(Inscricao_Numero__c = i));
}
insert testpontoList;

The inscricao_numero__c = 123 exists in contact, so the record is updated with contactid from Contact, but when i import the CSV file, do not update the record.

Answer 1

While using import wizard I have following logs:

DEBUG|{123.0}
{Id=0033600000MIRZOAA5, Inscricao_Numero__c=123}}

So the is no problem in selecting from contact, but we can't get values from map.

You can change key field type to String or use type conversion:

if (matchingcontactsMap.get((integer)pontos.Inscricao_Numero__c) != null)
{
    pontos.Contato__c = matchingcontactsMap.get((integer)pontos.Inscricao_Numero__c).Id;