@payloadcms/plugin-import-export/dist/utilities/setNestedValue.js

Import-Export plugin for Payload

/**
 * Sets a value deeply into a nested object or array, based on a dot-notation path.
 *
 * This function:
 * - Supports array indexing (e.g., "array.0.field1")
 * - Creates intermediate arrays/objects as needed
 * - Mutates the target object directly
 *
 * @example
 * const obj = {}
 * setNestedValue(obj, 'group.array.0.field1', 'hello')
 * // Result: { group: { array: [ { field1: 'hello' } ] } }
 *
 * @param obj - The target object to mutate.
 * @param path - A dot-separated string path indicating where to assign the value.
 * @param value - The value to set at the specified path.
 */ export const setNestedValue = (obj, path, value)=>{
    const parts = path.split('.');
    let current = obj;
    for(let i = 0; i < parts.length; i++){
        const part = parts[i];
        const isLast = i === parts.length - 1;
        const isIndex = !Number.isNaN(Number(part));
        if (isIndex) {
            const index = Number(part);
            // Ensure the current target is an array
            if (!Array.isArray(current)) {
                current = [];
            }
            // Ensure the array slot is initialized
            if (!current[index]) {
                current[index] = {};
            }
            if (isLast) {
                current[index] = value;
            } else {
                current = current[index];
            }
        } else {
            // Ensure the object key exists
            if (isLast) {
                if (typeof part === 'string') {
                    current[part] = value;
                }
            } else {
                if (typeof current[part] !== 'object' || current[part] === null) {
                    current[part] = {};
                }
                current = current[part];
            }
        }
    }
};

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