Issue passing array of JSON to variables

[bradpurchase]

I am having a hard time figuring out how to make this library send a variable whose value is an array of JSON.

My code looks essentially like this:

package main

import (
  "fmt"
  "log"
  "os"
  mailjet "github.com/mailjet/mailjet-apiv3-go"
)

type Item struct {
  ID   int    `json:"id"`
  Name string `json:"name"`
}

func main () {
  mailjetClient := NewMailjetClient(os.Getenv("MJ_APIKEY_PUBLIC"), os.Getenv("MJ_APIKEY_PRIVATE"))

  items := []Item{
    {
      ID:   1,
      Name: "Hello",
    },
    {
      ID:   2,
      Name: "World",
    },
  }
  itemsJSON, err := json.Marshal(items)
  if err != nil {
    log.Fatal(err)
  }

  messagesInfo := []mailjet.InfoMessagesV31{
    mailjet.InfoMessagesV31{
      From: &mailjet.RecipientV31{
        Email: "brad@test.com",
        Name: "Brad",
      },
      To: &mailjet.RecipientsV31{
        mailjet.RecipientV31 {
          Email: "passenger1@example.com",
          Name: "passenger 1",
        },
      },
      TemplateID: 1234567,
      TemplateLanguage: true,
      Subject: "This is my test email",
      Variables: map[string]interface{}{
        "query_string": "foo",
        "items": string(itemsJSON),
      },
    },
  }
  messages := mailjet.MessagesV31{Info: messagesInfo}
  res, err := m.SendMailV31(&messages)
  if err != nil {
    log.Fatal(err)
  }
  fmt.Printf("Data: %+v", res)
}

In my template, I want to use mjml code like {% for item in var:items %} and display some HTML within each iteration to present to the user. Pretty simple use case from what I understand, and I can get that part working if I try sending a cURL version of this - it has no problem with the array variable.

With the above Go code I get a template language error upon sending complaining about the items variable not being an array, e.g.:

A template language occurred when sending a message using Template 1234567: "var:items" is not an array value

This error makes sense in a way, because I am sending it as a string as otherwise itemsJSON will be a slice of bytes, which is certainly incorrect. However I am unsure how to get Mailjet to read what I'm passing as an array and have things work as expected in this case. Please help!

[teros0]

Hey Brad.
Have you tried sending it without marshaling an array manually first, like

Variables: map[string]interface{}{
        "query_string": "foo",
        "items": items,
   },

It could be that you're marshaling it twice in this example, once manually and then implicitly inside SendMailV31

[paologf-mb]

Hello, I'm having the same issue trying to use an array as variable for MailJet, keeping the same code example above I tried both:

Variables: map[string]interface{}{
        "query_string": "foo",
        "items": items,
   },

and

Variables: map[string]interface{}{
        "query_string": "foo",
        "items": string(itemJSON),
   },

In the first case the email was sent but the array is empty, in the second case the email was blocked by MailJet (so I think there is a syntax issue, the same as above).

The code on MailJet is very simple and from the Test section it works:

{% for item in var:items %}
	Item: {{item.name}}
{% endfor %}

Any suggestion?

Thanks

Paolo