Mutations

Mutations allow you to modify your product feed's data in various ways. Below is a list of available mutations grouped by category, each with a brief description and link to its dedicated guide.

General

• Overwrite: Overwrite the entire value with a new value.

Text

• Replace: Replace a part of the value with a new value.
• Replace Many: Replace multiple values at once using a list of search and replacement pairs.
• Remove: Remove a part of the value.
• Remove duplicates: Remove duplicate values.
• Add prefix: Add a prefix to the value.
• Add suffix: Add a suffix to the value.
• Truncate: Truncate text to a given max length.
• Modify text: Modify text like capitalize, lowercase, etc.

Math

• Calculate: Perform a calculation.
• Round: Round a number.
• Format: Format a number.

List

• Length: Calculate the length of text or list.
• Append: Append a value to a list.
• Prepend: Prepend a value to a list.
• Take: Take a part of a list.
• Sort: Sort a list ascending or descending.
• Join: Concatenate list items into a single string.
• Split: Split a string into a list.
• Filter: Filter a list based on rules.

JSON

• Lists of objects: How Feedr works with JSON objects and lists of objects, and how to repeat nested output per list entry.
• Parse JSON: Turn JSON text into an object or a list of objects.
• Stringify JSON: Turn an object or a list of objects back into one JSON text.
• Find object: Pick the first object whose attribute matches a condition.
• Extract attribute: Read one attribute from an object.
• Pluck attribute: Read one attribute from every object in a list.
• Filter objects: Keep or remove objects by an attribute.
• Sort objects: Order objects by an attribute or a priority order.
• Count objects: Count the objects in a list.

Dates

• Manipulate date: Add or subtract time from a date value.
• Format date: Format a date value into a specific string format.

Google Sheet

• Lookup (Google Sheet): Lookup and overwrite value based on a column A and B in Google Sheet.
• Replace (Google Sheet): Replace value or values based on a column A and B in Google Sheet.
• Remove (Google Sheet): Remove value or values based on a column A in Google Sheet.
• Exists (Google Sheet): Check if value exists in Google Sheet.

Each mutation comes with its set of options and examples to help you implement them effectively.