Create Intent API issue: TypeError: wrong argument type Symbol

[joamaral]

Hello all, I'm getting an error while trying to create an Intent through the API with a custom payload:

TypeError: wrong argument type Symbol
from lib/google/cloud/dialogflow/v2/intents_client.rb:465

The code I'm using is the following:

dialogflow_api_request.create_intent("projects/#{params[:agent_id]}/agent", {
display_name: params[:display_name],
        training_phrases: training_phrases,
        messages: [
          {
            payload: {
              fields: {
                test: { string_value: 'foo' }
              }
            }
          }
        ]
      })

I don't have a clue why am I getting the error, since I'm able to create an intent providing text as a response instead of a custom payload:

text: {
    text: ["foo"]
  }

Can you please tell me if this is a gem issue, or if I'm doing something wrong?

Thanks in advance!
João

[blowmage]

Using hashes to represent the values will only work so far. The issue you are running into is creating a Google::Protobuf::Struct object. The Google::Protobuf::Struct#fields attribute is not a Ruby Hash, but a Google::Protobuf::Map. Map acts like a statically typed Hash, and this one requires a String key and a Google::Protobuf::Value value. So the first error you are getting is because you are passing a Symbol instead of a String. ( The test in { test: { string_value: 'foo' } } is a Symbol.)

The second error you are likely to run into is that the value's conversion from a Ruby Hash to Google::Protobuf::Value.

dialogflow_api_request.create_intent(
  "projects/#{params[:agent_id]}/agent", 
  {
    display_name: params[:display_name],
    training_phrases: training_phrases,
    messages: [
      {
        payload: {
          fields: {
            'test' => { string_value: 'foo' }
          }
        }
      }
    ]
  }
)
# raises TypeError: Invalid type Hash to assign to submessage field.

To resolve this error you will need to create a Google::Protobuf::Value object and pass that in the fields hash:

dialogflow_api_request.create_intent(
  "projects/#{params[:agent_id]}/agent", 
  {
    display_name: params[:display_name],
    training_phrases: training_phrases,
    messages: [
      {
        payload: {
          fields: {
            'test' => Google::Protobuf::Value.new(string_value: 'foo')
          }
        }
      }
    ]
  }
)

[joamaral]

@blowmage thank you so much for your help. Understood! One last question: How could I append another hash inside the fields hash?

Meaning:

payload: {
          fields: {
            'test' => Google::Protobuf::Value.new(string_value: 'foo'),
            'anotherHash' => {
                'test' => Google::Protobuf::Value.new(string_value: 'foo'),
                'another' => Google::Protobuf::Value.new(string_value: 'bar'),
          }
        }

I've been trying to do achieve this, and I believe I should use Google::Protobuf::Struct, am I right?

[blowmage]

The nested hash still needs to be a Google::Protobuf::Value object. But, it can be a struct_value type of value object, with a Google::Protobuf::Struct value:

payload: Google::Protobuf::Struct.new(
  fields: {
    'test' => Google::Protobuf::Value.new(string_value: 'foo'),
    'anotherHash' => Google::Protobuf::Value.new(
      struct_value: Google::Protobuf::Struct.new(
        fields: {
          'test' => Google::Protobuf::Value.new(string_value: 'foo'),
          'another' => Google::Protobuf::Value.new(string_value: 'bar'),
        }
      )
    )
  }
)
`