QueryExpression<T, InstanceType> class

Contains methods for adding logical expressions to properties when building a Query.

You do not create instances of this type directly, but instead are returned an instance when selecting a property of an object in Query.where. You invoke methods from this type to add an expression to the query for the selected property. Example:

    final query = new Query<Employee>()
      ..where((e) => e.name).equalTo("Bob");

Constructors

QueryExpression(KeyPath keyPath)

QueryExpression.byAddingKey(QueryExpression<T, InstanceType> original, ManagedPropertyDescription byAdding)

Properties

expression ↔ PredicateExpression?

getter/setter pair

hashCode → int

The hash code for this object.

no setter, inherited

keyPath → KeyPath

final

not → QueryExpression<T, InstanceType>

Inverts the next expression.

no setter

runtimeType → Type

A representation of the runtime type of the object.

no setter, inherited

Methods

beginsWith(String value, {bool caseSensitive = true}) → QueryExpressionJunction<T, InstanceType>

Adds a 'begins with string' expression to a query.

between(T lhs, T rhs) → QueryExpressionJunction<T, InstanceType>

Adds a 'between two values' expression to a query.

contains(String value, {bool caseSensitive = true}) → QueryExpressionJunction<T, InstanceType>

Adds a 'contains string' expression to a query.

endsWith(String value, {bool caseSensitive = true}) → QueryExpressionJunction<T, InstanceType>

Adds a 'ends with string' expression to a query.

equalTo(T value, {bool caseSensitive = true}) → QueryExpressionJunction<T, InstanceType>

Adds an equality expression to a query.

greaterThan(T value) → QueryExpressionJunction<T, InstanceType>

Adds a 'greater than' expression to a query.

greaterThanEqualTo(T value) → QueryExpressionJunction<T, InstanceType>

Adds a 'greater than or equal to' expression to a query.

identifiedBy(dynamic identifier) → QueryExpressionJunction<T, InstanceType>

Adds an equality expression for foreign key columns to a query.

isNotNull() → QueryExpressionJunction<T, InstanceType>

Adds a 'not null check' expression to a query.

isNull() → QueryExpressionJunction<T, InstanceType>

Adds a 'null check' expression to a query.

lessThan(T value) → QueryExpressionJunction<T, InstanceType>

Adds a 'less than' expression to a query.

lessThanEqualTo(T value) → QueryExpressionJunction<T, InstanceType>

Adds a 'less than or equal to' expression to a query.

like(String value, {bool caseSensitive = true}) → QueryExpressionJunction<T, InstanceType>

Adds a like expression to a query.

noSuchMethod(Invocation invocation) → dynamic

Invoked when a nonexistent method or property is accessed.

inherited

notEqualTo(T value, {bool caseSensitive = true}) → QueryExpressionJunction<T, InstanceType>

Adds a 'not equal' expression to a query.

notLike(String value, {bool caseSensitive = true}) → QueryExpressionJunction<T, InstanceType>

Adds a 'not like' expression to a query.

oneOf(Iterable<T> values) → QueryExpressionJunction<T, InstanceType>

Adds a 'equal to one of' expression to a query.

outsideOf(T lhs, T rhs) → QueryExpressionJunction<T, InstanceType>

Adds a 'outside of the range crated by two values' expression to a query.

toString() → String

A string representation of this object.

inherited

Operators

operator ==(Object other) → bool

The equality operator.

inherited