dialogflow with node.js how do you swtich intents - node.js

Question

I have an intent that has a required parameter and a fulfilment. When you answer it takes you to my node.js application which currently looks like this:
app.intent(QUESTIONS_INTENT, (conv, params) => {
let data = conv.data;
let categoryId = data.categoryId;
let formulas = data.formulas;
let options = {
'method': 'PUT',
'url': apiUrl + 'questions/filter',
'body': {
categoryId: categoryId,
organisationId: organisation,
formulas: formulas
},
'json': true
};
return request(options).then(response => {
// We need to change how we get these
var questionText = params.questions;
var questions = response.filter(item => item.text === questionText);
data.questions = questions;
conv.ask(questions[0].text);
conv.contexts.set('colour');
}, error => {
conv.ask(JSON.stringify(error));
});
})
Currently it gets the questionText and finds the question that matches what you said. What I want it to do is to swap to a new intent. I have tried by conv.contexts.set('colour') but that doesn't appear to work.
I have an intent setup with input context as "Colour" so I would expect that when my fulfilment completes, it should swap to that intent, but it doesn't.
Can someone help me with this?

Answer 1

You need to make sure that you have a colour intent setup in DialogFlow that will handle the input from the user and respond to them. The question should be asked after you set the context.
return request(options).then(response => {
// We need to change how we get these
var questionText = params.questions;
var questions = response.filter(item => item.text === questionText);
data.questions = questions;
// Sets the context to colour.
conv.contexts.set('colour', 1);
// Now that the context is in control you'll be able to ask a question.
conv.ask(questions[0].text);
You'll also want to provide a lifespan after the context arg. This will make the context active for that many prompts, in the example above I set it for one so your question context will only be active for that specific response.
conv.contexts.set('colour', 1);