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Formula - concat

Easily merge string values using the Nodinite concat Formula plugin. This page shows how to combine strings from message [Content][], Context, or the output of other formulas.

🎯 Designed for business users and integrators — no developer required; you can even use AI to craft expressions.

  • ✅ Merge data from any Payload or Context in any Log Event
  • ✅ Combine multiple string values into a single result
  • ✅ Transform and surface meaningful data in Nodinite [Log Views], search filters, and self-service diagnostics
  • ✅ Combine with other Formula functions for powerful, layered expressions

What does the concat Formula do?

The concat(Content1, Content2, ...) Formula function merges two or more string values into a single result. Use it with static text, message bodies, context values, or the results from other Formula functions to create combined data in your views.

How it works: Input ➜ concat ➜ Result

graph LR A["Input: Multiple strings/values"] --> B["concat(Content1, Content2, ...)"] B --> C["Result: Combined string"]

Flow: Multiple input values are concatenated into a single output string.

Syntax

Concatenate static strings: (See Example 1)

concat('String1', 'String2')

Concatenate with message body: (See Example 2)

concat(body, 'String')

Concatenate with message context: (See Example 4)

concat('String', context('MessageContextKey'))

Concatenate with nested formula: (See Example 5)

concat(jsonpath('$.path', body), 'String')

Common patterns:

concat(body, ' - ', context('id'))          # Body + separator + context
concat('Prefix: ', body)                     # Add prefix to body
concat(body, body)                           # Duplicate content

Examples

Example 1: Concatenate static strings

Input

No input required (static values only)

Formula Expression 

concat('Formula', 'Plugin')

Result

FormulaPlugin

standaloneParameters

Example 2: Concatenate message body with static string

Input

Message body is Nod

Formula Expression 

concat(body, 'inite')

Result

Nodinite

firstParameterFromBody

Example 3: Concatenate body with itself

Input

Message body is Nod

Formula Expression 

concat(body, body)

Result

NodNod

body as Parameter

Example 4: Concatenate static value with context value

Input

Message context contains a property id with value ination

Formula Expression 

concat('Imag', context('id'))

Result

Imagination

contextAsContent

Example 5: Use a formula function as a parameter

Input

Message context contains a property id with value:

{ "Id": 2 }

Formula Expression 

concat(jsonpath('Id', context('id')), 'A')

Result

2A

functionAsContextParameter

Example 6: Advanced nested functions

Input

Message body is gmt

Message context contains a property id with value utc

Formula Expression 

concat(touppercase(regex('gmt|utc', body)), touppercase(substring(0, 3, context('id'))))

Result

GMTUTC

Nested Functions As Parameters

Message Context

Features

Important

The concat Formula merges two or more string values into a single result. This function loads the entire message into RAM—use on small messages only.

  • Flexible Inputs: Merge from static text, message body, Context, or the result of another Formula
  • Multiple Values: Combine 2 or more strings in a single expression
  • Composable: Chain with other Formula functions like touppercase(), jsonpath(), substring()
  • Self-Service: Let business users build combined fields without developer intervention

How to use

To use the concat Formula in a Search Field Expression:

  1. Open your Nodinite Web Client
  2. Navigate to Administration → Search Fields
  3. Create or edit a Search Field
  4. Choose Formula as the expression type
  5. Enter your concatenation expression using the Syntax patterns above

Next step