mongoose check if document exists
var query = Model.find({
/* query */
}).lean().limit(1);
// Find the document
query.exec(function(error, result) {
if (error) { throw error; }
// If the document doesn't exist
if (!result.length) {
// Create a new one
var model = new Model(); //use the defaults in the schema
model.save(function(error) {
if (error) { throw error; }
// do something with the document here
});
}
// If the document does exist
else {
// Update it
var query = { /* query */ },
update = {},
options = {};
Model.update(query, update, options, function(error) {
if (error) { throw error; }
// do the same something with the document here
// in this case, using result[0] from the topmost query
});
}
});