mongoc_find_and_modify_opts_set_update() – Adds update argument to the builder.
Synopsis
bool mongoc_find_and_modify_opts_set_update (mongoc_find_and_modify_opts_t *opts, const bson_t *update);
NOTE
- New in mongoc 1.3.0
Parameters
- opts
- A mongoc_find_and_modify_opts_t \&.
- update
- The update document is the same format as the update document passed to mongoc_collection_update \&.
Description
Adds update argument to the builder.
Returns
Returns true if it successfully added the option to the builder.
Setting Update
void fam_update(mongoc_collection_t *collection)
{
mongoc_find_and_modify_opts_t *opts;
bson_t *update;
bson_t reply;
bson_error_t error;
bson_t query = BSON_INITIALIZER;
bool success;
/* Find Zlatan Ibrahimovic */
BSON_APPEND_UTF8 (&query, "firstname", "Zlatan");
BSON_APPEND_UTF8 (&query, "lastname", "Ibrahimovic");
/* Make him a book author */
update = BCON_NEW ("$set", "{",
"author", BCON_BOOL (true),
"}");
opts = mongoc_find_and_modify_opts_new ();
/* Note that the document returned is the _previous_ version of the document
* To fetch the modified new version, use
* mongoc_find_and_modify_opts_set_flags (opts, MONGOC_FIND_AND_MODIFY_RETURN_NEW);
*/
mongoc_find_and_modify_opts_set_update (opts, update);
success = mongoc_collection_find_and_modify_with_opts (collection, &query, opts, &reply, &error);
if (success) {
char *str;
str = bson_as_json (&reply, NULL);
printf ("%s\n", str);
bson_free (str);
} else {
fprintf(stderr, "Got error: \"%s\" on line %d\n", error.message, __LINE__);
}
bson_destroy (&reply);
bson_destroy (update);
bson_destroy (&query);
mongoc_find_and_modify_opts_destroy (opts);
}
Outputs:
{
"lastErrorObject": {
"updatedExisting": true,
"n": 1
},
"value": {
"_id": {
"$oid": "56562a99d13e6d86239c7b00"
},
"age": 35,
"firstname": "Zlatan",
"goals": 342,
"lastname": "Ibrahimovic",
"profession": "Football player",
"position": "striker"
},
"ok": 1
}
Colophon
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