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HasMany

Struct HasMany 

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pub struct HasMany<T, Join = ()> { /* private fields */ }
Expand description

Represents a “has-many” navigation - ?a collection of related entities.

Corresponds to EFCore’s collection navigation property (e.g., ICollection<Post>).

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impl<T, Join> HasMany<T, Join>

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pub fn new() -> Self

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pub fn with(items: Vec<T>) -> Self

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pub fn items(&self) -> &[T]

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pub fn items_mut(&mut self) -> &mut Vec<T>

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pub fn add(&mut self, item: T)

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pub fn remove(&mut self, index: usize) -> Option<T>

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pub fn len(&self) -> usize

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pub fn is_empty(&self) -> bool

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pub fn is_loaded(&self) -> bool

Returns true if the navigation has been loaded (either eagerly via Include or lazily via [load]).

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pub fn set_lazy_context(&mut self, ctx: Arc<dyn LazyContext>)

Attaches a lazy-loading context to this container.

Called by the #[derive(EntityType)] macro’s ILazyInit implementation when lazy loading is enabled on the DbContext.

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pub async fn load(&mut self) -> EFResult<()>
where T: IFromRow + IEntityType + ILazyInit, Join: 'static,

Triggers lazy loading of this collection navigation.

If the navigation is already loaded, this is a no-op. If no LazyContext is attached (lazy loading disabled), returns Ok(()) without loading.

After this call, [items] returns the loaded collection.

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impl<T, Join> Clone for HasMany<T, Join>

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fn clone(&self) -> Self

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<T, Join> Debug for HasMany<T, Join>

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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, Join> Default for HasMany<T, Join>

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fn default() -> Self

Returns the “default value” for a type. Read more

Auto Trait Implementations§

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impl<T, Join = ()> !RefUnwindSafe for HasMany<T, Join>

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impl<T, Join = ()> !UnwindSafe for HasMany<T, Join>

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impl<T, Join> Freeze for HasMany<T, Join>

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impl<T, Join> Send for HasMany<T, Join>
where T: Send, Join: Send,

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impl<T, Join> Sync for HasMany<T, Join>
where T: Sync, Join: Sync,

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impl<T, Join> Unpin for HasMany<T, Join>
where T: Unpin, Join: Unpin,

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impl<T, Join> UnsafeUnpin for HasMany<T, Join>

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> 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> 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.