In watson conversation how to extract multiple values entered in input text - json

Question

Iam working on an application where I display products in my inventory based on the user's "price range"..
I need to know how to extract the values (prices) entered in the input text.
I tried using the system entities #sys-currency & #sys-number but I can extract only one value(the first value)..
example:
the user asks to "display products between $200 and $500"
how can i extract both the values to be compared with the individual products prices and display relevant products..
suggestions appreciated..

Answer 1

In the node in watson conversation you can access entities as array. In your case it will be:
Currency 1: <? entities['sys-currency'] != null && entities['sys-currency'].size()> 0 ? entities['sys-currency'][0].value : "---" ?>; Currency 2: <? entities['sys-currency'] != null && entities['sys-currency'].size()> 1 ? entities['sys-currency'][1].value : "---" ?>
You need to add proper null checks and checks if array has more that one entered currency

Answer 2

If you're using nodejs, based on conversation-simple example from IBM Developers, you can do something like:
And the Node:
Code for access this values:
function updateMessage(input, data, req, res) {
console.log("Entties: "+JSON.stringify(data.entities));
//200 and 500 do something
if (data.entities[0].value == '200' && data.entities[1].value == '500') {
console.log("User choice value:" + data.entities)
// showProducts(data, req, res); do something inside this function
// or paste your code for do something here
}
Debugg:
Obs.: If the user types only one value (#sys-currency) you'll need to create one if with one condition, and get this value for do something within your application with my example:
data.entities //if have one value
data.entities[i] //Watson return some array if have more than 1 value
One good idea is use the context variable and join for get all values, like:
{ "context": {
"result": "<? #sys-currency ?>"
}
},
If you passing in the context all items which in stock and you want to have output like We have X,Y,Z in stock, then you can create output in Watson
<? context.results.join(', ') ?> //all values return
Important: You need to access the data return from the Watson Conversation call (conversation.message) for access all values like entities, intents and context variables, among others. Like:
conversation.message(payload, function (err, data) {
console.log(data)
if (err) {
return res.status(err.code || 500).json(err);
}
}