Casting from JSON to Dictionary to CDT, array entries are null

RE: Casting from JSON to Dictionary to CDT, array entries are null

stevenh6272 — Tue, 12 Jul 2022 13:47:51 GMT

The CDTs were built from the WSDL.... so it is a matter of getting DotNet to build the WSDL in a way that is compatible with Appian. I will see what I can do for this.

Thank you.

RE: Casting from JSON to Dictionary to CDT, array entries are null

Stefan Helzle — Tue, 12 Jul 2022 13:44:55 GMT

In Appian CDTs, you would make the field "books" in the top-level CDT of type "Book" and a multiple. This will then cast perfectly from/to JSON. The in-between CDT is not necessary.

RE: Casting from JSON to Dictionary to CDT, array entries are null

stevenh6272 — Tue, 12 Jul 2022 13:40:43 GMT

This is apparently how DotNet handles defining list/array-based properties in the WSDL.

Here's the service class in C#

RE: Casting from JSON to Dictionary to CDT, array entries are null

Stefan Helzle — Tue, 12 Jul 2022 12:59:01 GMT

Hm ... this seems a bit weird. Why is there a books field which is of a type that has only one field "book" which is a list of books.

I understand that the provided JSON does not cast to this structure.

To understand what is going on, create a data structure using the CDT types and turn that into JSON to spot the difference.

RE: Casting from JSON to Dictionary to CDT, array entries are null

stevenh6272 — Tue, 12 Jul 2022 12:52:53 GMT

Here are the CDTs. These were imported from a DotNet web service's WSDL.

Here is a fragment from the WSDL that defines these.

		<xs:schema elementFormDefault="qualified" targetNamespace="http://schemas.datacontract.org/2004/07/TestService" xmlns:xs="http://www.w3.org/2001/XMLSchema" xmlns:tns="http://schemas.datacontract.org/2004/07/TestService">
			<xs:complexType name="Library">
				<xs:sequence>
					<xs:element minOccurs="0" name="Books" nillable="true" type="tns:ArrayOfBook"/>
					<xs:element minOccurs="0" name="HeadLibrarian" nillable="true" type="xs:string"/>
					<xs:element minOccurs="0" name="Name" nillable="true" type="xs:string"/>
				</xs:sequence>
			</xs:complexType>
			<xs:element name="Library" nillable="true" type="tns:Library"/>
			<xs:complexType name="ArrayOfBook">
				<xs:sequence>
					<xs:element minOccurs="0" maxOccurs="unbounded" name="Book" nillable="true" type="tns:Book"/>
				</xs:sequence>
			</xs:complexType>
			<xs:element name="ArrayOfBook" nillable="true" type="tns:ArrayOfBook"/>
			<xs:complexType name="Book">
				<xs:sequence>
					<xs:element minOccurs="0" name="Author" nillable="true" type="xs:string"/>
					<xs:element minOccurs="0" name="DueDate" nillable="true" type="xs:dateTime"/>
					<xs:element minOccurs="0" name="IsCheckedOut" type="xs:boolean"/>
					<xs:element minOccurs="0" name="Title" nillable="true" type="xs:string"/>
				</xs:sequence>
			</xs:complexType>
			<xs:element name="Book" nillable="true" type="tns:Book"/>
		</xs:schema>

RE: Casting from JSON to Dictionary to CDT, array entries are null

Stefan Helzle — Tue, 12 Jul 2022 06:17:16 GMT

Can you post a screenshot of the CDT configuration?

RE: Casting from JSON to Dictionary to CDT, array entries are null

Andrew Hickingbotham — Tue, 12 Jul 2022 03:23:48 GMT

I've made my own CDTs and the casting works. Maybe there's an issue with the CDT? I used your exact local!rawData JSON string you provided above.