Struct MDQueryCondition 

pub struct MDQueryCondition { /* private fields */ }

A structure for building complex, nested query conditions with logical operators.

MDQueryCondition allows for creating sophisticated search expressions by combining multiple conditions with either logical AND (All) or logical OR (Any) operators. It can be used to build complex queries that are not easily expressible with the simple chained methods of MDQueryBuilder.

Implementations

impl MDQueryCondition

pub fn into_expression(self) -> String

Converts the condition structure into a query expression string.

This method recursively processes the condition structure, combining all expressions according to the condition_type (All = AND, Any = OR) and returning a properly formatted query string that can be used with MDQuery.

Returns

A string representation of the combined query expression, properly parenthesized.

pub fn add(&mut self, expr: MDQueryConditionExpression)

Add a new expression to the condition.

Parameters

• expr - The expression to add to the condition

pub fn is_empty(&self) -> bool

Checks if the condition is empty.

Returns

True if the condition is empty, false otherwise.

Trait Implementations

impl Default for MDQueryCondition

fn default() -> Self

Returns the “default value” for a type.