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According to the documentation here in order to retrieve a list of picklist values for an object we need to pass in a Record Type Id which can be retrieved using the getObjectInfo method.

The issue is that these are both wire functions and I cannot figure out how to chain these methods.

If I try code like the following:

getObjectInfo( objectApiName: ACCOUNT_OBJECT )
 .then(result => 
 return getPicklistValues(recordTypeId: result.defaultRecordTypeId, fieldApiName: TYPE_FIELD);
 )
 .then(result => 
 this.picklistValues = result.data
 )
 .catch(error => 
 this.error = error;
 );

I get an error

render threw an error in 'c:getpicklistexample' [Imperative use is not
supported. Use @wire(getObjectInfo).]

If I try something like

@track rtId;

 @wire(getObjectInfo, objectApiName: ACCOUNT_OBJECT )
 handleResult(error, data) 
 if(data) 
 this.rtId = data.defaultRecordTypeId;
 
 

 @wire(getPicklistValues, recordTypeId: this.rtId,fieldApiName: TYPE_FIELD)
 picklistValues;

Then it throws an internal server error. Anybody have an idea as to how I could retrieve the record type Id and then call to get the pick list values like the documentation suggests?

FYI my imports are:

import LightningElement, wire, track from 'lwc';
import getPicklistValues, getObjectInfo from 'lightning/uiObjectInfoApi';
import TYPE_FIELD from '@salesforce/schema/Account.Type';
import ACCOUNT_OBJECT from '@salesforce/schema/Account';

You have to use dynamic binding:

@wire(getPicklistValues, recordTypeId: "$rtId", fieldApiName: TYPE_FIELD)
picklistValues;

This is mentioned in Use the Wire Service to Get Data.

I wrote a mockup that demonstrates this. You should be able to copy-paste this code directly.

<template>
 <template if:true=hasPicklistValues>
 <select>
 <template for:each=picklistValues.data.values for:item="entry">
 <option key=entry.value value=entry.label>entry.label</option>
 </template>
 </select>
 </template>
</template>

import LightningElement, wire, track from 'lwc';
import getPicklistValues, getObjectInfo from 'lightning/uiObjectInfoApi';
import TYPE_FIELD from '@salesforce/schema/Account.Type';
import ACCOUNT_OBJECT from '@salesforce/schema/Account';


export default class Democomponent extends LightningElement 
 @track rtId;
 @track error;

 @wire(getObjectInfo, objectApiName: ACCOUNT_OBJECT )
 handleResult(error, data) 
 if(data) 
 this.rtId = data.defaultRecordTypeId;
 else 
 this.error = error;
 
 

 @wire(getPicklistValues, recordTypeId: "$rtId", fieldApiName: TYPE_FIELD)
 picklistValues;

 get hasPicklistValues() 
 return this.picklistValues && this.picklistValues.data && this.picklistValues.data.values;