mongoc_find_and_modify_opts_append − mongoc_find_and_modify_opts_append()
bool mongoc_find_and_modify_opts_append (mongoc_find_and_modify_opts_t *opts, const bson_t *extra);
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opts: A mongoc_find_and_modify_opts_t. | ||
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extra: A bson_t with fields and values to append directly to the findAndModify command sent to the server. |
Adds arbitrary options to the findAndModify command.
extra does not have to remain valid after calling this function.
extra may be NULL or a BSON document with additional command options:
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writeConcern: Construct a mongoc_write_concern_t and use mongoc_write_concern_append() to add the write concern to opts. See the example code for mongoc_client_write_command_with_opts(). | ||
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sessionId: First, construct a mongoc_client_session_t with mongoc_client_start_session(). You can begin a transaction with mongoc_client_session_start_transaction(), optionally with a mongoc_transaction_opt_t that overrides the options inherited from collection, and use mongoc_client_session_append() to add the session to opts. See the example code for mongoc_client_session_t. | ||
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hint: A document or string that specifies the index to use to support the query predicate. | ||
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let: A BSON document consisting of any number of parameter names, each followed by definitions of constants in the MQL Aggregate Expression language. | ||
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comment: A bson_value_t specifying the comment to attach to this command. The comment will appear in log messages, profiler output, and currentOp output. Requires MongoDB 4.4 or later. |
Returns true on success. If any arguments are invalid, returns false and logs an error.
opts.c
void fam_opts (mongoc_collection_t *collection) { mongoc_find_and_modify_opts_t *opts; bson_t reply; bson_t *update; bson_error_t error; bson_t query = BSON_INITIALIZER; mongoc_write_concern_t *wc; bson_t extra = BSON_INITIALIZER; bool success; /* Find Zlatan Ibrahimovic, the striker */ BSON_APPEND_UTF8 (&query, "firstname", "Zlatan"); BSON_APPEND_UTF8 (&query, "lastname", "Ibrahimovic"); BSON_APPEND_UTF8 (&query, "profession", "Football player"); /* Bump his age */ update = BCON_NEW ("$inc", "{", "age", BCON_INT32 (1), "}"); opts = mongoc_find_and_modify_opts_new (); mongoc_find_and_modify_opts_set_update (opts, update); /* Abort if the operation takes too long. */ mongoc_find_and_modify_opts_set_max_time_ms (opts, 100); /* Set write concern w: 2 */ wc = mongoc_write_concern_new (); mongoc_write_concern_set_w (wc, 2); mongoc_write_concern_append (wc, &extra); /* Some future findAndModify option the driver doesn't support conveniently */ BSON_APPEND_INT32 (&extra, "futureOption", 42); mongoc_find_and_modify_opts_append (opts, &extra); success = mongoc_collection_find_and_modify_with_opts ( collection, &query, opts, &reply, &error); if (success) { char *str; str = bson_as_canonical_extended_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 (&extra); bson_destroy (update); bson_destroy (&query); mongoc_write_concern_destroy (wc); mongoc_find_and_modify_opts_destroy (opts); }
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