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
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
Example: Concatenating static strings results in 'FormulaPlugin'.
Example 2: Concatenate message body with static string
Input:
Message body is Nod
Formula Expression:
concat(body, 'inite')
Result:
Nodinite
Example: Message body 'Nod' concatenated with 'inite' results in 'Nodinite'.
Example 3: Concatenate body with itself
Input:
Message body is Nod
Formula Expression:
concat(body, body)
Result:
NodNod
Example: Body 'Nod' concatenated with itself results in 'NodNod'.
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
Example: Static text 'Imag' concatenated with context value 'ination' results in 'Imagination'.
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
Example: Using jsonpath to extract 'Id' (value 2) and concatenating with 'A' results in '2A'.
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
Example: Advanced nested functions using regex, touppercase, and substring to create 'GMTUTC'.
Example: Message context property 'id' with value 'utc' used in nested function concatenation.
Features
Important
The
concatFormula 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:
- Open your Nodinite Web Client
- Navigate to Administration → Search Fields
- Create or edit a Search Field
- Choose Formula as the expression type
- Enter your concatenation expression using the Syntax patterns above
Next step
- Learn how to create a Search Field with an Expression