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Mapping

Enum Mapping 

Source
pub enum Mapping {
    Associative(Associative),
    Error(Error),
    Execute(Execute),
    Standard(Standard),
    Empty(Empty),
}
Expand description

Mapping is used in response::Result and Query::results()

§Examples

Match your response::Result to a concrete Response

use rqlite_client::response::{self, Result};
use rqlite_client::{Mapping, Response};

// // for description of the data structure
// let response_result: Result =
//     Ok(Response::Query(response::query::Query {
//         results: vec![Mapping::Error(response::mapping::Error {
//             error: String::new(),
//         })],
//         sequence_number: None,
//         time: None,
//     }));

let response_result: Option<Result> = None;

if let Some(Ok(response_result)) = response_result {
    let query = response::Query::from(response_result);
    for result in query.results() {
        match result {
            Mapping::Error(err) => err.to_string(),
            _ => "no error".to_string(),
        };
    }
}

Convert Result to an own data struct

use rqlite_client::response::{self, Query, Result};
use rqlite_client::response::mapping::Timed;
use rqlite_client::{Mapping, Response};

struct MyData {
    timing: std::time::Duration,
}

impl TryFrom<&Mapping> for MyData {
    type Error = rqlite_client::Error;

    fn try_from(r: &Mapping) -> std::result::Result<Self, Self::Error> {
        match r {
            Mapping::Associative(r) => Ok(MyData {
                timing: r.duration().unwrap(),
            }),
            Mapping::Standard(r) => Ok(MyData {
                timing: r.duration().unwrap(),
            }),
            _ => Err(rqlite_client::Error::from("not expected MyData")),
        }
    }
}

let response_result: Option<Result> = None;

if let Some(Ok(response_result)) = response_result {
    let query = response::Query::from(response_result);
    let my_data = query
        .results()
        .filter_map(|r| MyData::try_from(r).ok())
        .collect::<Vec<MyData>>();
}

Variants§

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Associative(Associative)

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Error(Error)

See Error

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Execute(Execute)

See Execute

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Standard(Standard)

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Empty(Empty)

See Empty

Trait Implementations§

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impl Clone for Mapping

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fn clone(&self) -> Mapping

Returns a duplicate of the value. Read more
1.0.0 (const: unstable) · Source§

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source. Read more
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impl Debug for Mapping

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fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter. Read more
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impl<'de> Deserialize<'de> for Mapping

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fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>
where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer. Read more
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impl PartialEq for Mapping

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fn eq(&self, other: &Mapping) -> bool

Tests for self and other values to be equal, and is used by ==.
1.0.0 (const: unstable) · Source§

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.
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impl Serialize for Mapping

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fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>
where __S: Serializer,

Serialize this value into the given Serde serializer. Read more
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impl StructuralPartialEq for Mapping

Auto Trait Implementations§

Blanket Implementations§

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impl<T> Any for T
where T: 'static + ?Sized,

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fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more
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impl<T> Borrow<T> for T
where T: ?Sized,

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fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more
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impl<T> BorrowMut<T> for T
where T: ?Sized,

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fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more
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impl<T> CloneToUninit for T
where T: Clone,

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unsafe fn clone_to_uninit(&self, dest: *mut u8)

🔬This is a nightly-only experimental API. (clone_to_uninit)
Performs copy-assignment from self to dest. Read more
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impl<T> DeserializeOwned for T
where T: for<'de> Deserialize<'de>,

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impl<T> ErasedDestructor for T
where T: 'static,

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impl<T> From<T> for T

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fn from(t: T) -> T

Returns the argument unchanged.

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impl<T> Instrument for T

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fn instrument(self, span: Span) -> Instrumented<Self>

Instruments this type with the provided Span, returning an Instrumented wrapper. Read more
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fn in_current_span(self) -> Instrumented<Self>

Instruments this type with the current Span, returning an Instrumented wrapper. Read more
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impl<T, U> Into<U> for T
where U: From<T>,

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fn into(self) -> U

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

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impl<T> Same for T

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type Output = T

Should always be Self
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impl<T> ToOwned for T
where T: Clone,

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type Owned = T

The resulting type after obtaining ownership.
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fn to_owned(&self) -> T

Creates owned data from borrowed data, usually by cloning. Read more
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fn clone_into(&self, target: &mut T)

Uses borrowed data to replace owned data, usually by cloning. Read more
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impl<T, U> TryFrom<U> for T
where U: Into<T>,

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type Error = Infallible

The type returned in the event of a conversion error.
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fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

Performs the conversion.
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impl<T, U> TryInto<U> for T
where U: TryFrom<T>,

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type Error = <U as TryFrom<T>>::Error

The type returned in the event of a conversion error.
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fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.
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impl<T> WithSubscriber for T

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fn with_subscriber<S>(self, subscriber: S) -> WithDispatch<Self>
where S: Into<Dispatch>,

Attaches the provided Subscriber to this type, returning a WithDispatch wrapper. Read more
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fn with_current_subscriber(self) -> WithDispatch<Self>

Attaches the current default Subscriber to this type, returning a WithDispatch wrapper. Read more