使用Zeep处理含xsd:choice的getDetail请求参数问题

Got it, let's tackle this Zeep + XSD choice issue step by step. First, let's recap what your XSD is saying: the getDetail operation expects a request where you send exactly one of four possible parameters—uno, dos, tres, or cuatro. Zeep natively supports XSD <choice> elements, but you need to make sure you're passing only the selected field in your service call.

How to Structure Your Zeep Calls #

First, initialize your Zeep client as usual:

from zeep import Client

# Replace with your actual WSDL URL or local path
client = Client("http://your-webservice-endpoint?wsdl")

Then, use one of the following examples based on which parameter you need to send:

1. Using the uno string parameter

Simply pass the uno keyword argument with your string value:

response = client.service.getDetail(uno="your-unique-string-for-uno")

2. Using the dos custom DosType parameter

First, create an instance of the custom DosType using Zeep's get_type method, then pass it as the dos argument:

# Get the DosType definition from the WSDL
DosType = client.get_type("uct:DosType")

# Create an instance (fill in all required fields for DosType here)
dos_value = DosType(
    example_field_1="some-value",
    example_field_2=456,
    # Add any other required fields for your specific DosType
)

# Call the service with the dos parameter
response = client.service.getDetail(dos=dos_value)

3. Using the tres custom E164Type parameter

Same approach as DosType—create an instance of the custom type first:

# Get the E164Type definition
E164Type = client.get_type("uct:E164Type")

# Create an instance (adjust fields to match your E164Type structure)
tres_value = E164Type(
    phone_number="+1-800-555-1234"
)

# Call the service with the tres parameter
response = client.service.getDetail(tres=tres_value)

4. Using the cuatro string parameter

Just like uno, pass the string value directly:

response = client.service.getDetail(cuatro="your-string-value-for-cuatro")

Common Pitfalls to Avoid #

• Don't pass multiple choice parameters: The XSD strictly requires only one of the four options. If you send more than one (e.g., uno="foo" and dos=bar_instance), Zeep will throw a validation error.
• Validate custom types: If DosType or E164Type have required fields, you must populate all of them. You can inspect the structure of these types by printing the result of client.get_type("uct:DosType")—it will show you all required and optional fields.
• Debug if things go wrong: If you're still getting errors, enable Zeep's debug logging to see the raw SOAP request being sent. This helps you confirm if the payload matches what the WebService expects:

  import logging
  logging.basicConfig(level=logging.DEBUG)
  

内容的提问来源于stack exchange，提问作者mhkore