Saving using the kiota-abstractions-go/serialization Package

[dadams39]

How can SDK be used to write retrieved items?

Related to: #140
In the code example: https://docs.microsoft.com/en-gb/graph/sdks/paging?tabs=Go

The snippet highlights how to receive each Message from the Mailbox. Messages are defined [here][]

The SerializationWriter Interface is defined within Kiota abstractions, but it is unclear which how to save a particular message to an app.
Code is adapted from provided code above:

target := "My Message"
// Iterate over all pages (e.g. Messages)
iterateErr := pageIterator.Iterate(func(pageItem interface{}) bool {
    message := pageItem.(models.Messageable)
    fmt.Printf("%s\n", *message.GetSubject())
    if target == *message.GetSubject() {
        entries := message.GetFieldDeserializers(). // MAP Key: <string> Type: func(serialization.ParseNode) error
        for key, value := in range entries{
            // NEED CODE FOR HERE
            val() // NOT VALID     
    // Return true to continue the iteration
    return true
})

How do you get the value out of the value?
Golang produces the following error:

not enough arguments in call to val
        have ()
        want (serialization.ParseNode)

If the code for val is changed to val( message ), the error becomes:

cannot use message (variable of type models.Messageable) as type serialization.ParseNode in argument to val:
        models.Messageable does not implement serialization.ParseNode (missing GetBoolValue method)
       

This conflict seems to exist in the Kiota Library. I'm unsure if changing the code in the models directory will satisfy the complaint or if it requires a change to the serialization framework in Kiota or if it could be the case that I'm not seeing something the actual solution.

[dadams39]

Updates to the discussion have been made in:
#140

For the TL;dr, the Kiota abstractions deep-dive pages are located here:
https://microsoft.github.io/kiota/extending/serialization.html
https://microsoft.github.io/kiota/extending/models.html
While I am able to get the raw bytes of a message, it is still unclear how to take a Page Item and copy it to a local variable. Reparsing the bytes into an object does seem like going backward.

[baywet]

Are you trying to assign the subject of the first message to the target variable? Or am I missing something?

[dadams39]

This is the flow process.

• Model looks scans the entire mailbox for subjects matching a criterion (spam)
• If the message subject is a match, all of the fields of the message are to be saved to a file which I documented in Issue Serialization Method requires clarification #140.
• After all the messages have been saved, the messages in question need to be but into []Messages. (At this point, they are bytes... See Issue Parse Node Failure from Original Serialized Bytes #148).

It is unclear how to perform the last step. That is my question.

[baywet]

Thanks for clarifying the intent, I'll provide an answer we can mark.

[baywet]

target := "My Message"
// Iterate over all pages (e.g. Messages)
iterateErr := pageIterator.Iterate(func(pageItem interface{}) bool {
    message := pageItem.(models.Messageable)
    fmt.Printf("%s\n", *message.GetSubject())
    if target == *message.GetSubject() {
        writer, err := requestAdapter.GetSerializationWriterFactory().GetSerializationWriter("application/json")
        err := writer.WriteObjectValue("", message)
        serializedValue, err := writer.GetSerializedContent()
        // do something with the serialized value like persist it or send to another process etc...
        parseNode, err := absser.DefaultParseNodeFactoryInstance.GetRootParseNode("application/json", serializedValue)
        deserializedValue, err := parseNode.GetObjectValue(models.CreateMessageFromDiscriminatorValue)
       // do something with the deserialized value
    // Return true to continue the iteration
    return true
})

absser is an import of github.com/microsoft/kiota-abstractions-go/serialization
models of msgraph-go-sdk/models

Note: you should look into odata query parameters (filter) to see whether the filtering can be done service side for you as opposed to client side.

[dadams39]

@baywet,

I am receiving this failure during this line of code

parseNode, err := absser.DefaultParseNodeFactoryInstance.GetRootParseNode("application/json", serializedValue)
err >>> invalid character 'C' after object key:value pair

I changed a few items on the serializedValue to keep my data private, but here is the serialized value:

{"id":"AAMkAGQ1NzViZTdhLTEwMTMtNGJjNi05YWI2LTg4NWRlZDA2Y2UxOABGAAAAAAAPvVwUramXT7jlSGpVU8_7BwB8wYc0thTTTYl3RpEYIUq_AAAAAAEMAAB8wYc0thTTTYl3RpEYIUq_AAACXyeJAAA=","@odata.etag":"W/"CQAAABYAAAB8
wYc0thTTTYl3RpEYIUq+AAACXq4h"""body":{"content":"Thanks for taking the time!                                                                                                                   
                                                                                                                                                                                               
From: Some Person <[email protected]>                                                                                                                                         
Date: Friday, April 8, 2022 at 2:06 PM                                                                                                                                                         
To: That Person <[email protected]>                                                                                                                                                              
Subject: Start                                                                                                                                                                                 
Send one                                                                                                                                                                                       
","contentType":"TEXT"},"sender":{"emailAddress":{"address":"[email protected]","name":"That Person"}},"subject":"Re: Start"}

Would this mean that Issue #148 is still valid 🤷 ?

[baywet]

I logged an issue in the json serialization lib that's a bit more specific. microsoft/kiota-serialization-json-go#11
Would you be willing to submit a pull request to address it?

[dadams39]

I see there is a PR already in the repo. I will look at those specific changes. In regards to the microsoft/kiota-serialization-json-go repository, do you have a preferred naming convention for test files, @baywet ?

[baywet]

For the naming convention just name_test.go