ChoicePrompt clears UserState or StepContext

问题

I implemented a bot with the Microsoft BotFramework. For gathering user data, I use ChoicePrompts. When a user doesn't choose one of the proposed options, the ChoicePrompt repeats until the user enters a valid option (this is default behavior from the prompt method).

Unfortunately, the stepContext seems to refresh, if the ChoicePrompt reprompts the user. I used this documentation to store user data. This means that I lose the data that has been prompted from the user until then.

This is my dialog:

// Create dialog for prompting user for profile data
    this.dialogSet.add(new WaterfallDialog('createProfile', [
        this.promptForName.bind(this),
        this.promptForAge.bind(this),
        this.promptForGender.bind(this),
        this.promptForEducation.bind(this),
        this.promptForMajor.bind(this),
        this.promptForOtherMajor.bind(this),
        this.completeProfile.bind(this)
    ]));

Those are the methods in which the problem appears. In "promptForEducation" the ChoicePrompt is used.

        async promptForEducation (step) {
            console.log("Education Prompt");
            // Retrieve user object from UserState storage
            const user = await this.userData.get(step.context, {});
            // Before saving entry, check if it already exists
            if(!user.gender){
                user.gender = step.result.value;
                // Give user object back to UserState storage
                await this.userData.set(step.context, user);
            }
            // Before prompting, check if value already exists
            if (!user.education){
                const user = await this.userData.get(step.context, {});
                console.log(user);
                // Prompt for highest education with list of education options
                return await step.prompt('choicePrompt', 'What is your highest education', ['Bachelor', 'Master']);
            } else {
                return await step.next();
            }
        }
        async promptForMajor (step) {
            console.log("Major Prompt");
            // Retrieve user object from UserState storage
            const user = await this.userData.get(step.context, {});
            console.log(user);
            // Before saving entry, check if it already exists
            if(!user.education){
                user.education = step.result.value;
                // Give user object back to UserState storage
                await this.userData.set(step.context, user);
                console.log(user);
            }
            // Before prompting, check if value already exists
            if (!user.major){
                // Copy List of majors and add "Other" entry
                let majorsOther = majors.slice(0,majors.length);
                majorsOther.push("Einen anderen Studiengang");
                return await step.prompt('choicePrompt', userData.major.prompt, majorsOther);
            } else {
                return await step.next();
            }
        }

As you can see, I retrieve the user data as follows:

// Retrieve user object from UserState storage
        const user = await this.userData.get(step.context, {});

And I save it like this:

// Give user object back to UserState storage
            await this.userData.set(step.context, user);

When directly choosing a valid option from the "education" array, everything is fine. This is how my console output looks like (I log the "user"-object 3 times in the snipped. Once before and twice after the ChoicePrompt)

User added Name Prompt Age Prompt Gender Prompt Education Prompt { name: 'John Doe', age: 18, gender: 'Männlich' } Major Prompt { name: 'John Doe', age: 18, gender: 'Männlich' } { name: 'John Doe', age: 18, gender: 'Männlich', education: 'Bachelor' }

As soon as I answer the ChoicePrompt with an invalid message, I get reprompted but then the "StepContext" seems to refresh and my "user" Object is empty:

User added Name Prompt Age Prompt Gender Prompt Education Prompt { name: 'John Doe 2', age: 18, gender: 'Männlich' } Major Prompt {} { education: 'Bachelor' }

Is there any way to fix this? Am I using some method differently from how it's intended? Thank you in advance.

来源：https://stackoverflow.com/questions/54635967/choiceprompt-clears-userstate-or-stepcontext

标签

javascript

node.js

botframework

prompt