GoLang mgo - mgo.ErrNotFound for searching (...). All (...)
I have GoLang code:
c.Find(selectQuery).All(&results)
if err == mgo.ErrNotFound {
// error handling
}
selectQuery
The meaning is not important here.
I never get the error ErrNotFound
. Even if the request doesn't match any results, I don't get it ErrNotFound
. I am getting a variable result
with empty attributes. How do I change the code to handle the ErrNotFound
case?
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Query.All()
never returns mgo.ErrNotFound
, so it's useless to check that. If there are no results, the length results
will be 0, so you might find that if there were no errors:
err := c.Find(selectQuery).All(&results)
if err != nil { {
// error handling
return
}
// If you must detect "not found" case:
if len(results) == 0 {
// No results
}
mgo.ErrNotFound
used / returned by other methods, usually those that should work on the same document, like Query.One()
or Query.Apply()
.
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