Trait ColumnTrait 

pub trait ColumnTrait: IdenStatic + Iterable {
    const TABLE: &'static str;

    // Required method
    fn def(&self) -> ColumnDef;

    // Provided methods
    fn as_column_ref(&self) -> ColumnRef { ... }
    fn into_expr(self) -> Expr { ... }
    fn eq<V: Into<Value>>(&self, v: V) -> Expr { ... }
    fn ne<V: Into<Value>>(&self, v: V) -> Expr { ... }
    fn gt<V: Into<Value>>(&self, v: V) -> Expr { ... }
    fn gte<V: Into<Value>>(&self, v: V) -> Expr { ... }
    fn lt<V: Into<Value>>(&self, v: V) -> Expr { ... }
    fn lte<V: Into<Value>>(&self, v: V) -> Expr { ... }
    fn between<V: Into<Value>>(&self, a: V, b: V) -> Expr { ... }
    fn not_between<V: Into<Value>>(&self, a: V, b: V) -> Expr { ... }
    fn like(&self, pattern: &str) -> Expr { ... }
    fn not_like(&self, pattern: &str) -> Expr { ... }
    fn starts_with(&self, s: &str) -> Expr { ... }
    fn ends_with(&self, s: &str) -> Expr { ... }
    fn contains(&self, s: &str) -> Expr { ... }
    fn is_null(&self) -> Expr { ... }
    fn is_not_null(&self) -> Expr { ... }
    fn is_in<V: Into<Value>, I: IntoIterator<Item = V>>(
        &self,
        values: I,
    ) -> Expr { ... }
    fn is_not_in<V: Into<Value>, I: IntoIterator<Item = V>>(
        &self,
        values: I,
    ) -> Expr { ... }
    fn in_subquery(&self, select: Select) -> Expr { ... }
    fn not_in_subquery(&self, select: Select) -> Expr { ... }
    fn eq_col<C: ColumnTrait>(&self, other: C) -> Expr { ... }
    fn matches(&self, query: &str) -> Expr { ... }
    fn if_null<V: Into<Value>>(&self, v: V) -> Expr { ... }
    fn max(&self) -> Expr { ... }
    fn min(&self) -> Expr { ... }
    fn sum(&self) -> Expr { ... }
    fn count(&self) -> Expr { ... }
    fn avg(&self) -> Expr { ... }
}

A column of an entity, derived on the Column enum.

Provides the condition builders: Column::Name.eq("x"), Column::Age.gt(18) and so on. Every builder renders the column as table.column, so conditions stay unambiguous after a join.

Required Associated Constants

const TABLE: &'static str

The table this column belongs to.

Required Methods

fn def(&self) -> ColumnDef

The static definition used for schema generation.

Provided Methods

fn as_column_ref(&self) -> ColumnRef

The column as a qualified table.column reference.

fn into_expr(self) -> Expr

The column as an expression.

fn eq<V: Into<Value>>(&self, v: V) -> Expr

Builds col = v.

fn ne<V: Into<Value>>(&self, v: V) -> Expr

Builds col <> v.

fn gt<V: Into<Value>>(&self, v: V) -> Expr

Builds col > v.

fn gte<V: Into<Value>>(&self, v: V) -> Expr

Builds col >= v.

fn lt<V: Into<Value>>(&self, v: V) -> Expr

Builds col < v.

fn lte<V: Into<Value>>(&self, v: V) -> Expr

Builds col <= v.

fn between<V: Into<Value>>(&self, a: V, b: V) -> Expr

Builds col BETWEEN a AND b.

fn not_between<V: Into<Value>>(&self, a: V, b: V) -> Expr

Builds col NOT BETWEEN a AND b.

fn like(&self, pattern: &str) -> Expr

Builds col LIKE pattern.

fn not_like(&self, pattern: &str) -> Expr

Builds col NOT LIKE pattern.

fn starts_with(&self, s: &str) -> Expr

Builds col LIKE 's%'.

fn ends_with(&self, s: &str) -> Expr

Builds col LIKE '%s'.

fn contains(&self, s: &str) -> Expr

Builds col LIKE '%s%'.

fn is_null(&self) -> Expr

Builds col IS NULL.

fn is_not_null(&self) -> Expr

Builds col IS NOT NULL.

fn is_in<V: Into<Value>, I: IntoIterator<Item = V>>(&self, values: I) -> Expr

Builds col IN (values).

fn is_not_in<V: Into<Value>, I: IntoIterator<Item = V>>( &self, values: I, ) -> Expr

Builds col NOT IN (values).

fn in_subquery(&self, select: Select) -> Expr

Builds col IN (subquery).

fn not_in_subquery(&self, select: Select) -> Expr

Builds col NOT IN (subquery).

fn eq_col<C: ColumnTrait>(&self, other: C) -> Expr

Builds col = other.col, comparing two columns rather than a column and a value, for example across a join.

fn matches(&self, query: &str) -> Expr

Builds col MATCH query for full-text search.

fn if_null<V: Into<Value>>(&self, v: V) -> Expr

Builds IFNULL(col, v).

fn max(&self) -> Expr

Builds MAX(col).

fn min(&self) -> Expr

Builds MIN(col).

fn sum(&self) -> Expr

Builds SUM(col).

fn count(&self) -> Expr

Builds COUNT(col).

fn avg(&self) -> Expr

Builds AVG(col).

Dyn Compatibility

This trait is not dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety".

Implementors