# Issue with creating a loop of messages

**URL:** <https://discourse.nodered.org/t/issue-with-creating-a-loop-of-messages/87234>\
**Category:** General\
**Tags:** function-node\
**Created:** [14 April 2024 12:47 UTC](https://discourse.nodered.org/t/issue-with-creating-a-loop-of-messages/87234 "2024-04-14T12:47:10Z")\
**Posts on this page:** 6\
**Page:** 1

<div class="post-metadata">

**Author:** ![mfreudenberg](https://sea2.discourse-cdn.com/flex026/user_avatar/discourse.nodered.org/mfreudenberg/32/59181_2.png) [@mfreudenberg](https://discourse.nodered.org/u/mfreudenberg)\
**Post date:** [14 April 2024 12:47 UTC](https://discourse.nodered.org/t/issue-with-creating-a-loop-of-messages/87234/1 "2024-04-14T12:47:10Z")

</div>

Hi,

i'm currently stuck with a flow, that creates a message sequence within a function block.

I want to send messages through the Threema API Gateway. My issue is, that due to the limitations of the gateway i need to send a message for each receipient (don't ask why).

So i have created a function block, that generates the payload for the Threema gateway. But each time i run the flow, the payload gets only generated for the last ID. It seems somehow, that the for each loop is somehow wrong, or i'm making something specific wrong.

Can anyone help me? I think it's a super easy issue.

Thanks and BR,  
Michael

```auto
[
    {
        "id": "c498af33053021f0",
        "type": "http in",
        "z": "61c099bc8a5603ed",
        "name": "",
        "url": "/threema-orga",
        "method": "post",
        "upload": false,
        "swaggerDoc": "",
        "x": 150,
        "y": 120,
        "wires": [
            [
                "490a78e806b5f529"
            ]
        ]
    },
    {
        "id": "b1473b042df0bd27",
        "type": "http request",
        "z": "61c099bc8a5603ed",
        "name": "Threema-Gateway-Basic",
        "method": "POST",
        "ret": "obj",
        "paytoqs": "body",
        "url": "https://msgapi.threema.ch/send_simple",
        "tls": "",
        "persist": false,
        "proxy": "",
        "authType": "",
        "senderr": false,
        "x": 790,
        "y": 240,
        "wires": [
            [
                "58072af40205eb98",
                "ebe1aa117fd28da2"
            ]
        ]
    },
    {
        "id": "8220b91d97ead85d",
        "type": "function",
        "z": "61c099bc8a5603ed",
        "name": "CreateThreemaPayload",
        "func": "let toArray = [\"ABCDEF\", \"FEDCBA\"];\n\nif (msg.payload.content.items.length > 0 && msg.payload.content.items[0].state != \"confirmed\"){\n return;\n}\n\nlet msgArray = [];\nlet msgIndex = 0;\nfor (const to of toArray) {\n let from = \"*FUCSCLD\";\n let text = \"\";\n let secret = \"redacted\";\n let payload = msg.payload;\n if (payload.message){\n let user = payload.account.user;\n let titles = payload.content.items.map(i => i.name).join(', ');\n text += `👋 ${user} hat *${titles}* aktualisiert.\\n`;\n let content = payload.content;\n if (content.added && content.added.length > 0) {\n let addedTags = content.added.map(t => t.name).join(', ');\n text += `🔖 Tags hinzugefügt: ${addedTags}\\n`;\n }\n if (content.removed && content.removed.length > 0) {\n let removedTags = content.removed.map(t => t.name).join(' ');\n text += `🗑️ Tags entfernt: ${removedTags}\\n`;\n }\n if (content.itemUrl && content.items) {\n let docUrls = content.items\n .map(i => `${content.itemUrl}/${i.id}`)\n .join(', ');\n text += \"🌍 Link zum Dokument: \";\n text += `${docUrls}`;\n }\n text = text.trim();\n }\n \n msg.payload = `to=${to}&text=${text}&from=${from}&secret=${secret}`;\n msg.headers = { \n \"content-type\": \"application/x-www-form-urlencoded; charset=utf-8\" \n };\n msg.parts = { \n \"id\": to,\n \"index\": msgIndex++,\n \"count\": toArray.length\n }\n msgArray.push(msg)\n}\n\nreturn msgArray;",
        "outputs": 1,
        "noerr": 0,
        "initialize": "",
        "finalize": "",
        "libs": [],
        "x": 470,
        "y": 240,
        "wires": [
            [
                "a2bd49989a19b46f",
                "b1473b042df0bd27"
            ]
        ]
    },
    {
        "id": "58072af40205eb98",
        "type": "http response",
        "z": "61c099bc8a5603ed",
        "name": "",
        "statusCode": "",
        "headers": {},
        "x": 1030,
        "y": 240,
        "wires": []
    },
    {
        "id": "a2bd49989a19b46f",
        "type": "debug",
        "z": "61c099bc8a5603ed",
        "name": "",
        "active": true,
        "tosidebar": true,
        "console": false,
        "tostatus": false,
        "complete": "true",
        "targetType": "full",
        "statusVal": "",
        "statusType": "auto",
        "x": 670,
        "y": 120,
        "wires": []
    },
    {
        "id": "ebe1aa117fd28da2",
        "type": "debug",
        "z": "61c099bc8a5603ed",
        "name": "Threema-Gateway-Response",
        "active": true,
        "tosidebar": true,
        "console": false,
        "tostatus": false,
        "complete": "true",
        "targetType": "full",
        "statusVal": "",
        "statusType": "auto",
        "x": 1150,
        "y": 320,
        "wires": []
    },
    {
        "id": "dd9881d750617ca6",
        "type": "catch",
        "z": "61c099bc8a5603ed",
        "name": "",
        "scope": null,
        "uncaught": false,
        "x": 780,
        "y": 440,
        "wires": [
            [
                "374d62d53aeb9d52",
                "0b98194c50dd5e02"
            ]
        ]
    },
    {
        "id": "374d62d53aeb9d52",
        "type": "http response",
        "z": "61c099bc8a5603ed",
        "name": "",
        "statusCode": "500",
        "headers": {},
        "x": 1040,
        "y": 440,
        "wires": []
    },
    {
        "id": "490a78e806b5f529",
        "type": "switch",
        "z": "61c099bc8a5603ed",
        "name": "filter for eventType",
        "property": "payload.eventType",
        "propertyType": "msg",
        "rules": [
            {
                "t": "eq",
                "v": "TagsChanged",
                "vt": "str"
            }
        ],
        "checkall": "true",
        "repair": false,
        "outputs": 1,
        "x": 330,
        "y": 180,
        "wires": [
            [
                "8220b91d97ead85d",
                "066f6795a4c96f36"
            ]
        ]
    },
    {
        "id": "0b98194c50dd5e02",
        "type": "debug",
        "z": "61c099bc8a5603ed",
        "name": "",
        "active": true,
        "tosidebar": true,
        "console": false,
        "tostatus": false,
        "complete": "true",
        "targetType": "full",
        "statusVal": "",
        "statusType": "auto",
        "x": 950,
        "y": 380,
        "wires": []
    },
    {
        "id": "ce44bd897e227c52",
        "type": "inject",
        "z": "61c099bc8a5603ed",
        "name": "",
        "props": [
            {
                "p": "payload"
            }
        ],
        "repeat": "",
        "crontab": "",
        "once": false,
        "onceDelay": 0.1,
        "topic": "",
        "payload": "{\"message\":{\"title\":\"TagsChanged (by *Michael*)\",\"body\":\"Adding *Receipt*; Removing *Invoice* on [`MapleSirupLtd_202331.pdf`](https://docs.fuchscloud.de/app/item/BUYteMPs2F8-PQQKxQjjSd2-R9EkRctzg8j-hQdM9svoq82).\"},\"messageHtml\":{\"title\":\"<p>TagsChanged (by <em>Michael</em>)</p>\",\"body\":\"<p>Adding <em>Receipt</em>; Removing <em>Invoice</em> on <a href=\\\"https://docs.fuchscloud.de/app/item/BUYteMPs2F8-PQQKxQjjSd2-R9EkRctzg8j-hQdM9svoq82\\\"><code>MapleSirupLtd_202331.pdf</code></a>.</p>\"},\"eventType\":\"TagsChanged\",\"account\":{\"collective\":\"fuchscloud\",\"user\":\"Michael\",\"login\":\"fuchscloud/Michael\"},\"content\":{\"account\":{\"collectiveId\":3,\"collective\":\"fuchscloud\",\"userId\":\"8Xmbmh2td56-QKmPD4sgJrA-efKchSPHRej-j2fe3MuGyQd\",\"login\":\"Michael\"},\"items\":[{\"id\":\"BUYteMPs2F8-PQQKxQjjSd2-R9EkRctzg8j-hQdM9svoq82\",\"name\":\"MapleSirupLtd_202331.pdf\",\"dateMillis\":1704569295367,\"date\":\"2024-01-06\",\"direction\":\"incoming\",\"state\":\"confirmed\",\"dueDateMillis\":null,\"dueDate\":null,\"source\":\"webapp\",\"overDue\":false,\"dueIn\":null,\"corrOrg\":\"Acme AG\",\"notes\":null}],\"added\":[{\"id\":\"6pJ9CJJTQyR-j2ycebZx3FF-55Txdfrufmx-r9zxgz3Q6Hj\",\"name\":\"Receipt\",\"category\":\"doctype\"}],\"removed\":[{\"id\":\"3rGjYxdC1uN-1bj52m3h2ZG-zpg3T14fopi-jkQteAoZqEq\",\"name\":\"Invoice\",\"category\":\"doctype\"}],\"itemUrl\":\"https://docs.fuchscloud.de/app/item\"}}",
        "payloadType": "json",
        "x": 110,
        "y": 220,
        "wires": [
            [
                "490a78e806b5f529"
            ]
        ]
    },
    {
        "id": "066f6795a4c96f36",
        "type": "debug",
        "z": "61c099bc8a5603ed",
        "name": "",
        "active": true,
        "tosidebar": true,
        "console": false,
        "tostatus": false,
        "complete": "true",
        "targetType": "full",
        "statusVal": "",
        "statusType": "auto",
        "x": 490,
        "y": 120,
        "wires": []
    }
]

```

---

<div class="post-metadata">

**Author:** ![Steve-Mcl](https://sea2.discourse-cdn.com/flex026/user_avatar/discourse.nodered.org/steve-mcl/32/4826_2.png) [@Steve-Mcl](https://discourse.nodered.org/u/Steve-Mcl)\
**Post date:** [14 April 2024 13:09 UTC](https://discourse.nodered.org/t/issue-with-creating-a-loop-of-messages/87234/2 "2024-04-14T13:09:38Z")

</div>

Objects are saved in arrays as references (pointers) to the same object.

Clone the msg object before any adjustments and pushing it into the array.

```auto
const m = RED.util.cloneMessage(msg)
m.payload = "xxx" // change stuff
myArray.push(m)

```

---

<div class="post-metadata">

**Author:** ![mfreudenberg](https://sea2.discourse-cdn.com/flex026/user_avatar/discourse.nodered.org/mfreudenberg/32/59181_2.png) [@mfreudenberg](https://discourse.nodered.org/u/mfreudenberg)\
**Post date:** [14 April 2024 21:26 UTC](https://discourse.nodered.org/t/issue-with-creating-a-loop-of-messages/87234/3 "2024-04-14T21:26:50Z")

</div>

Hey,

thanks. That actually helped me to a bit. But i'm still stuck in creating/processing multiple messages.  
My problem is, i'm getting a single message and during the `CreateThreemaPayload` block i'm virtually generating more messages - for each ID i'm creating one message.  
How do i process each message, in a way that a POST-Request is sent for each message?

---

<div class="post-metadata">

**Author:** ![Steve-Mcl](https://sea2.discourse-cdn.com/flex026/user_avatar/discourse.nodered.org/steve-mcl/32/4826_2.png) [@Steve-Mcl](https://discourse.nodered.org/u/Steve-Mcl)\
**Post date:** [15 April 2024 07:46 UTC](https://discourse.nodered.org/t/issue-with-creating-a-loop-of-messages/87234/4 "2024-04-15T07:46:30Z")

</div>

> [@mfreudenberg](#):
>
> How do i process each message, in a way that a POST-Request is sent for each message

change the last line to

```auto
return [msgArray];

```

its all explained [in the docs](https://nodered.org/docs/user-guide/writing-functions#multiple-messages) 😉

---

<div class="post-metadata">

**Author:** ![mfreudenberg](https://sea2.discourse-cdn.com/flex026/user_avatar/discourse.nodered.org/mfreudenberg/32/59181_2.png) [@mfreudenberg](https://discourse.nodered.org/u/mfreudenberg)\
**Post date:** [16 April 2024 13:48 UTC](https://discourse.nodered.org/t/issue-with-creating-a-loop-of-messages/87234/5 "2024-04-16T13:48:40Z")

</div>

Yes,that's what I did. And now it works! Thanks a lot!

---

<div class="post-metadata">

**Author:** ![system](https://us1.discourse-cdn.com/flex026/uploads/nodered/original/1X/d073cd938eafa2e558d7c2cd59003b3ef4963033.png) [@system](https://discourse.nodered.org/u/system)\
**Post date:** [30 April 2024 13:49 UTC](https://discourse.nodered.org/t/issue-with-creating-a-loop-of-messages/87234/6 "2024-04-30T13:49:22Z")

</div>

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