Filter class

The Filter class is used to construct OData $filter expressions programmatically. It provides methods to create filters like eq (equals), ne (not equals), gt (greater than), lt (less than), and allows combining filters using logical AND/OR.

Example:

final filter = Filter.and(
  Filter.eq('Name', 'Milk'),
  Filter.lt('Price', 2.55),
);

print(filter.toString());
Output: "Name eq 'Milk' and Price lt 2.55"

Properties

hashCode → int

The hash code for this object.

no setter, inherited

runtimeType → Type

A representation of the runtime type of the object.

no setter, inherited

Methods

noSuchMethod(Invocation invocation) → dynamic

Invoked when a nonexistent method or property is accessed.

inherited

toString() → String

Converts the filter to a string for query usage.

override

Operators

operator ==(Object other) → bool

The equality operator.

inherited

Static Methods

and(Filter left, Filter right) → Filter

Combines two filters using a logical AND (e.g., "Name eq 'Milk' and Price lt 2.55").

eq(String field, dynamic value) → Filter

Creates an equality filter (e.g., "Name eq 'Milk'").

ge(String field, dynamic value) → Filter

Creates a greater-than or equal-to filter.

gt(String field, dynamic value) → Filter

Creates a greater-than filter (e.g., "Price gt 2.55").

le(String field, dynamic value) → Filter

Creates a less-than or equal-to filter.

lt(String field, dynamic value) → Filter

Creates a less-than filter (e.g., "Price lt 2.55").

ne(String field, dynamic value) → Filter

Creates a non-equality filter (e.g., "Name ne 'Milk'").

or(Filter left, Filter right) → Filter

Combines two filters using a logical OR (e.g., "Name eq 'Milk' or Price lt 2.55").