Struct mungos::FindOptions [−][src]
#[non_exhaustive]pub struct FindOptions {Show 21 fields
pub allow_disk_use: Option<bool>,
pub allow_partial_results: Option<bool>,
pub batch_size: Option<u32>,
pub comment: Option<String>,
pub cursor_type: Option<CursorType>,
pub hint: Option<Hint>,
pub limit: Option<i64>,
pub max: Option<Document>,
pub max_await_time: Option<Duration>,
pub max_scan: Option<u64>,
pub max_time: Option<Duration>,
pub min: Option<Document>,
pub no_cursor_timeout: Option<bool>,
pub projection: Option<Document>,
pub read_concern: Option<ReadConcern>,
pub return_key: Option<bool>,
pub selection_criteria: Option<SelectionCriteria>,
pub show_record_id: Option<bool>,
pub skip: Option<u64>,
pub sort: Option<Document>,
pub collation: Option<Collation>,
}
Expand description
Specifies the options to a Collection::find
operation.
Fields (Non-exhaustive)
This struct is marked as non-exhaustive
Struct { .. }
syntax; cannot be matched against without a wildcard ..
; and struct update syntax will not work.allow_disk_use: Option<bool>
Enables writing to temporary files by the server. When set to true, the find operation can write data to the _tmp subdirectory in the dbPath directory. Only supported in server versions 4.4+.
allow_partial_results: Option<bool>
If true, partial results will be returned from a mongos rather than an error being returned if one or more shards is down.
batch_size: Option<u32>
The number of documents the server should return per cursor batch.
Note that this does not have any affect on the documents that are returned by a cursor, only the number of documents kept in memory at a given time (and by extension, the number of round trips needed to return the entire set of documents returned by the query.
comment: Option<String>
Tags the query with an arbitrary string to help trace the operation through the database profiler, currentOp and logs.
cursor_type: Option<CursorType>
The type of cursor to return.
hint: Option<Hint>
The index to use for the operation.
limit: Option<i64>
The maximum number of documents to query. If a negative number is specified, the documents will be returned in a single batch limited in number by the positive value of the specified limit.
max: Option<Document>
The exclusive upper bound for a specific index.
max_await_time: Option<Duration>
The maximum amount of time for the server to wait on new documents to satisfy a tailable cursor query. If the cursor is not tailable, this option is ignored.
max_scan: Option<u64>
Maximum number of documents or index keys to scan when executing the query.
Note: this option is deprecated starting in MongoDB version 4.0 and removed in MongoDB 4.2. Use the maxTimeMS option instead.
max_time: Option<Duration>
The maximum amount of time to allow the query to run.
This options maps to the maxTimeMS
MongoDB query option, so the duration will be sent
across the wire as an integer number of milliseconds.
min: Option<Document>
The inclusive lower bound for a specific index.
no_cursor_timeout: Option<bool>
Whether the server should close the cursor after a period of inactivity.
projection: Option<Document>
Limits the fields of the document being returned.
read_concern: Option<ReadConcern>
The read concern to use for this find query.
If none specified, the default set on the collection will be used.
return_key: Option<bool>
Whether to return only the index keys in the documents.
selection_criteria: Option<SelectionCriteria>
The criteria used to select a server for this find query.
If none specified, the default set on the collection will be used.
show_record_id: Option<bool>
Whether to return the record identifier for each document.
skip: Option<u64>
The number of documents to skip before counting.
sort: Option<Document>
The order of the documents for the purposes of the operation.
collation: Option<Collation>
The collation to use for the operation.
See the documentation for more information on how to use this option.
Implementations
Create a builder for building FindOptions
.
On the builder, call .allow_disk_use(...)
(optional), .allow_partial_results(...)
(optional), .batch_size(...)
(optional), .comment(...)
(optional), .cursor_type(...)
(optional), .hint(...)
(optional), .limit(...)
(optional), .max(...)
(optional), .max_await_time(...)
(optional), .max_scan(...)
(optional), .max_time(...)
(optional), .min(...)
(optional), .no_cursor_timeout(...)
(optional), .projection(...)
(optional), .read_concern(...)
(optional), .return_key(...)
(optional), .selection_criteria(...)
(optional), .show_record_id(...)
(optional), .skip(...)
(optional), .sort(...)
(optional), .collation(...)
(optional) to set the values of the fields.
Finally, call .build()
to create the instance of FindOptions
.
Trait Implementations
Returns the “default value” for a type. Read more
pub fn deserialize<__D>(
__deserializer: __D
) -> Result<FindOptions, <__D as Deserializer<'de>>::Error> where
__D: Deserializer<'de>,
pub fn deserialize<__D>(
__deserializer: __D
) -> Result<FindOptions, <__D as Deserializer<'de>>::Error> where
__D: Deserializer<'de>,
Deserialize this value from the given Serde deserializer. Read more
Performs the conversion.
pub fn serialize<__S>(
&self,
__serializer: __S
) -> Result<<__S as Serializer>::Ok, <__S as Serializer>::Error> where
__S: Serializer,
pub fn serialize<__S>(
&self,
__serializer: __S
) -> Result<<__S as Serializer>::Ok, <__S as Serializer>::Error> where
__S: Serializer,
Serialize this value into the given Serde serializer. Read more
Auto Trait Implementations
impl !RefUnwindSafe for FindOptions
impl Send for FindOptions
impl Sync for FindOptions
impl Unpin for FindOptions
impl !UnwindSafe for FindOptions
Blanket Implementations
Mutably borrows from an owned value. Read more