RunnablePassthrough<RunInput extends Object> class
A RunnablePassthrough takes the input it receives and passes it through as output.
You can create a RunnablePassthrough using the Runnable.passthrough static method.
When you call invoke on a RunnablePassthrough, it will return the input it receives.
Example:
final openaiApiKey = Platform.environment['OPENAI_API_KEY'];
final model = ChatOpenAI(apiKey: openaiApiKey);
final promptTemplate = ChatPromptTemplate.fromTemplate(
'Tell me a joke about {foo}',
);
final map = Runnable.fromMap({
'foo': Runnable.passthrough(),
});
final chain = map | promptTemplate | model | StringOutputParser();
final res = await chain.invoke('bears');
print(res);
// Why don't bears wear shoes? Because they have bear feet!
- Inheritance
-
- Object
- Runnable<
RunInput, RunnableOptions, RunInput> - RunnablePassthrough
- Available extensions
Constructors
- RunnablePassthrough()
-
A RunnablePassthrough takes the input it receives and passes it through
as output.
const
Properties
- defaultOptions → RunnableOptions
-
The default options to use when invoking the Runnable.
finalinherited
- hashCode → int
-
The hash code for this object.
no setterinherited
- runtimeType → Type
-
A representation of the runtime type of the object.
no setterinherited
Methods
-
batch(
List< RunInput> inputs, {List<RunnableOptions> ? options}) → Future<List< RunInput> > -
Batches the invocation of the Runnable on the given
inputs
.inherited -
bind(
RunnableOptions options) → RunnableBinding< RunInput, RunnableOptions, RunInput> -
Binds the Runnable to the given
options
.inherited -
close(
) → void -
Cleans up any resources associated with it the Runnable.
inherited
-
getCompatibleOptions(
RunnableOptions? options) → RunnableOptions? -
Returns the given
options
if they are compatible with the Runnable, otherwise returnsnull
.inherited -
invoke(
RunInput input, {RunnableOptions? options}) → Future< RunInput> -
Invokes the RunnablePassthrough on the given
input
.override -
noSuchMethod(
Invocation invocation) → dynamic -
Invoked when a nonexistent method or property is accessed.
inherited
-
pipe<
NewRunOutput extends Object?, NewCallOptions extends RunnableOptions> (Runnable< RunInput, NewCallOptions, NewRunOutput> next) → RunnableSequence<RunInput, NewRunOutput> -
Pipes the output of this Runnable into another Runnable using a
RunnableSequence.
inherited
-
stream(
RunInput input, {RunnableOptions? options}) → Stream< RunInput> -
Streams the output of invoking the Runnable on the given
input
.inherited -
streamFromInputStream(
Stream< RunInput> inputStream, {RunnableOptions? options}) → Stream<RunInput> -
Streams the output of invoking the Runnable on the given
inputStream
.inherited -
toString(
) → String -
A string representation of this object.
inherited
-
withFallbacks(
List< Runnable< fallbacks) → RunnableWithFallback<RunInput, RunnableOptions, RunInput> >RunInput, RunInput> -
Adds fallback runnables to be invoked if the primary runnable fails.
inherited
-
withRetry(
{int maxRetries = 3, FutureOr< bool> retryIf(Object e)?, List<Duration?> ? delayDurations, bool addJitter = false}) → RunnableRetry<RunInput, RunInput> -
Adds retry logic to an existing runnable.
inherited
Operators
-
operator ==(
Object other) → bool -
The equality operator.
inherited
-
operator |(
Runnable< RunOutput, RunnableOptions, NewRunOutput> next) → RunnableSequence<RunInput, NewRunOutput> -
Available on Runnable<
Pipes the output of this Runnable into another Runnable.RunInput, CallOptions, RunOutput> , provided by the RunnableX extension