Class KeyBuilder<TEvent, TBuilder>

Namespace

Cratis.Chronicle.Projections

Assembly

Cratis.Chronicle.dll

Represents a default implementation of IKeyBuilder<TEvent, TBuilder> that works with IEventValueExpression.

public class KeyBuilder<TEvent, TBuilder> : IKeyBuilder<TEvent, TBuilder> where TBuilder : class

Type Parameters

TEvent

Event to build for.

TBuilder

Type of actual builder.

Inheritance

object

KeyBuilder<TEvent, TBuilder>

Implements

IKeyBuilder<TEvent, TBuilder>

Derived

KeyAndParentKeyBuilder<TEvent, TBuilder>

RemovedWithJoinBuilder<TReadModel, TEvent>

Inherited Members

object.Equals(object)

object.Equals(object, object)

object.GetHashCode()

object.GetType()

object.MemberwiseClone()

object.ReferenceEquals(object, object)

object.ToString()

Constructors

KeyBuilder(INamingPolicy)

Represents a default implementation of IKeyBuilder<TEvent, TBuilder> that works with IEventValueExpression.

public KeyBuilder(INamingPolicy namingPolicy)

Parameters

namingPolicy INamingPolicy

The INamingPolicy to use for property names.

Fields

_keyExpression

protected PropertyExpression _keyExpression

Field Value

PropertyExpression

Methods

UsingCompositeKey<TKeyType>(Action<ICompositeKeyBuilder<TKeyType, TEvent>>)

Define what key to use based on a composite of expressions.

public TBuilder UsingCompositeKey<TKeyType>(Action<ICompositeKeyBuilder<TKeyType, TEvent>> builderCallback)

Parameters

builderCallback Action<ICompositeKeyBuilder<TKeyType, TEvent>>

Builder callback for building the composite key.

Returns

TBuilder

Builder continuation.

Type Parameters

TKeyType

Type of key.

UsingConstantKey(string)

Define a constant value to use as the key. All events of this type will update the same read model instance.

public TBuilder UsingConstantKey(string value)

Parameters

value string

The constant value to use as key.

Returns

TBuilder

Builder continuation.

UsingKeyFromContext<TProperty>(Expression<Func<EventContext, TProperty>>)

Define what key to use based on a value in the EventContext.

public TBuilder UsingKeyFromContext<TProperty>(Expression<Func<EventContext, TProperty>> keyAccessor)

Parameters

keyAccessor Expression<Func<EventContext, TProperty>>

Accessor for the property within EventContext to use.

Returns

TBuilder

Builder continuation.

Type Parameters

TProperty

Type of the property.

UsingKey<TProperty>(Expression<Func<TEvent, TProperty>>)

Define what key to use. This is optional, if not set - it will default to using the event source identifier on the event.

public TBuilder UsingKey<TProperty>(Expression<Func<TEvent, TProperty>> keyAccessor)

Parameters

keyAccessor Expression<Func<TEvent, TProperty>>

Accessor for the property to use.

Returns

TBuilder

Builder continuation.

Type Parameters

TProperty

Type of the property.