Struct diesel::r2d2::ConnectionManager

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pub struct ConnectionManager<T> { /* private fields */ }
Available on crate feature r2d2 only.
Expand description

An r2d2 connection manager for use with Diesel.

See the r2d2 documentation for usage examples.

Implementations§

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impl<T> ConnectionManager<T>

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pub fn new<S: Into<String>>(database_url: S) -> Self

Returns a new connection manager, which establishes connections to the given database URL.

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pub fn update_database_url<S: Into<String>>(&mut self, database_url: S)

Modifies the URL which was supplied at initialization.

This does not update any state for existing connections, but this new URL is used for new connections that are created.

Trait Implementations§

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impl<T: Clone> Clone for ConnectionManager<T>

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fn clone(&self) -> ConnectionManager<T>

Returns a copy of the value. Read more
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fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source. Read more
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impl<T> Debug for ConnectionManager<T>

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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<T> ManageConnection for ConnectionManager<T>
where T: R2D2Connection + Send + 'static,

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type Connection = T

The connection type this manager deals with.
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type Error = Error

The error type returned by Connections.
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fn connect(&self) -> Result<T, Error>

Attempts to create a new connection.
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fn is_valid(&self, conn: &mut T) -> Result<(), Error>

Determines if the connection is still connected to the database. Read more
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fn has_broken(&self, conn: &mut T) -> bool

Quickly determines if the connection is no longer usable. Read more
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impl<T: Send + 'static> Sync for ConnectionManager<T>

Auto Trait Implementations§

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impl<T> Freeze for ConnectionManager<T>

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impl<T> RefUnwindSafe for ConnectionManager<T>
where T: RefUnwindSafe,

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impl<T> Send for ConnectionManager<T>
where T: Send,

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impl<T> Unpin for ConnectionManager<T>
where T: Unpin,

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impl<T> UnwindSafe for ConnectionManager<T>
where T: UnwindSafe,

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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default unsafe fn clone_to_uninit(&self, dst: *mut T)

🔬This is a nightly-only experimental API. (clone_to_uninit)
Performs copy-assignment from self to dst. Read more
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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, 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> IntoSql for T

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fn into_sql<T>(self) -> AsExprOf<Self, T>

Convert self to an expression for Diesel’s query builder. Read more
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fn as_sql<'a, T>(&'a self) -> AsExprOf<&'a Self, T>

Convert &self to an expression for Diesel’s query builder. Read more
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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<V, T> VZip<V> for T
where V: MultiLane<T>,

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fn vzip(self) -> V