Marcin Stefaniuk created COUCHDB-1506:
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Summary: View returns null value after adding a document
Key: COUCHDB-1506
URL: https://issues.apache.org/jira/browse/COUCHDB-1506
Project: CouchDB
Issue Type: Bug
Components: JavaScript View Server
Affects Versions: 1.2
Environment: Windows XP SP3
Reporter: Marcin Stefaniuk
I have three types of documents: customer, refill and purchase. I defined a
view that aggregates customer data with current balance (from refill / purchase
values). Values customer._id and purchase/refill.customer are joining keys. Map
function looks as follows:
function(doc) {
if (doc.type=='purchase' || doc.type=='refill') {
emit(doc.customer, {value: doc.value, type: doc.type});
} else if (doc.type=='customer') {
emit(doc._id, doc);
}
}
Reduce function is:
function(keys, values, rereduce) {
var customer = null, sum = 0;
values.forEach(function(element) {
if (element.type=='purchase') {
sum -= element.value;
} else if (element.type=='refill') {
sum += element.value;
} else if (customer==null && element.type=='customer') {
customer = element;
}
});
customer.credit = sum;
return customer;
}
This view is working with success but after several adding of purchase
documents it returns null as value.
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