Struct WhereBuilder

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pub struct WhereBuilder { /* private fields */ }

Expand description

where 片段构造器，便于以函数式方式累加过滤条件

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impl WhereBuilder

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pub fn new() -> Self

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pub fn eq(self, column: impl Into<String>, value: impl Into<Value>) -> Self

添加等值条件：column = ?

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pub fn like(self, column: impl Into<String>, value: impl Into<String>) -> Self

添加模糊条件：column LIKE ?，自动包裹 %

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pub fn raw<I, V>(self, sql: impl Into<String>, params: I) -> Self
where I: IntoIterator<Item = V>, V: Into<Value>,

添加自定义 SQL 片段

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pub fn build(self) -> Vec<WhereFragment>

Trait Implementations§

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impl Default for WhereBuilder

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fn default() -> WhereBuilder

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

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impl UnwindSafe for WhereBuilder

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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> 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 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> IntoEither for T

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fn into_either(self, into_left: bool) -> Either<Self, Self>

Converts self into a Left variant of Either<Self, Self> if into_left is true. Converts self into a Right variant of Either<Self, Self> otherwise. Read more

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fn into_either_with<F>(self, into_left: F) -> Either<Self, Self>
where F: FnOnce(&Self) -> bool,

Converts self into a Left variant of Either<Self, Self> if into_left(&self) returns true. Converts self into a Right variant of Either<Self, Self> otherwise. Read more

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