Jolt transform array to array nifi | nifi-jolt-nar Description Applies a list of Jolt specifications to either the FlowFile JSON content or a specified FlowFile JSON attribute. Grab LHS key values. My Json Input format are the 4 types of follows as below: [ { "a": "1" } ] or [ { "a": "1", & Feb 18, 2022 · Created on 02-22-2022 03:44 AM - edited 02-22-2022 03:46 AM Thank you so much @araujo for the help. Learn how to effectively transform arrays using Jolt with clear examples and step-by-step instructions. name" and see what the output looks like. Input: { "md": { "fn" A node module for transforming and performing operations on JSON. Is it possible to have the new flatten array and the original array within one jolt spec? This is the current structure Feb 24, 2022 · I am trying to transform the following object into an array, the object is formatted already as required just needs to be output as an array containing that object. May 2, 2023 · How to write a jolt spec to convert different objects into an array Asked 2 years, 6 months ago Modified 2 years, 6 months ago Viewed 778 times Mar 1, 2018 · I'm trying to extract and merge objects from an array contained in some (but not all) of my input elements. Is it something i am missing wit May 4, 2024 · It seems like you may be referring to the JOLT transformation library used within Java applications for JSON-to-JSON transformation. I tried creating a couple of merged versions and one or the other doesn't seem to work. In UpdateAttribute, you can call the attribute whatever you want the message to be, and for the JOLT transform, you can have multiple entries in the spec, each matching a separate entry from the JSON. 0 Bundle org. Tools Transformer (JOLT) V2 Transformer: Getting to know JOLT Discover more about the JOLT applications and how to use its transformations on the Digibee Integration Platform. What's reputation and how do I get it? Instead, you can save this post to reference later. I. Mar 28, 2018 · bazaarvoice / jolt Public Notifications You must be signed in to change notification settings Fork 348 Star 1. May 3, 2023 · Transform arrays of objects to array of objects with jolt Asked 2 years, 6 months ago Modified 2 years, 6 months ago Viewed 53 times Oct 22, 2021 · Jolt Convert string attribut to array only if it match to a condition Asked 3 years, 6 months ago Modified 3 years, 6 months ago Viewed 877 times Dec 7, 2021 · Description I am working on a problem required JSON to JSON conversion, so I am using Jolt library for that. those that have a certain value), the rest will be discarded. These keys on the array are dynamic and can change. Sep 2, 2016 · In a JOLT spec, if you don't explicitly provide a transformation for a particular field, it will be excluded. inside the object lang is array. It will always have one object which is fix. So you can include matching rules for the fields you care about (i. Also, the arrays I'm trying to merge contain Dec 3, 2020 · I want to achieve following JSON transformation using Jolt processor in NIFI By focusing on values field, in the first input in json (id 900551), values are populated as the following input JSON { Oct 3, 2022 · Having issues flattening the nested array in an array of objects back to its parent. I just need to convert the decimal characters to string, but for the life of me I cannot get it to work, as per the example it would be the policy_revisi Apr 16, 2024 · I am using JOLT to transform a JSON array to JSON array but unable to transform like expected. and provide minimal reproducible example. When I convert array value to String, I am not able to get the proper value in my object. Learn practical steps to streamline your JSO Transform Cache Size: Compiling a Jolt Transform can be fairly expensive. This is because with () modifies only one element by creating a shallow copy of the original array. I have the following input json (simplified): { "object": { "settings": [ JoltTransformJSON Description: Applies a list of Jolt specifications to the flowfile JSON payload. See full list on devasking. It consists of a nested JSON array with no keys. It is a litte bit different from this one, because: I don't know how to write into an exi Oct 4, 2023 · In my Nifi dataflow, I'm attempting to filter and transform JSON using the JOLT processor, so I'm very new to this. Bucket data from an Array, based on a leaf level value. If the JSON transform fails, the original FlowFile is routed to the 'failure' relationship. Jul 22, 2023 · Simple: Select a single jolt transform type from the drop-down, then type or paste the specification JSON Chained: Multiple Jolt specifications can be chained together sequentially in an array of simple specifications Stock Transforms Shift: Read values or portions of the input JSON tree and add them to specified locations in the output. However, shifting data within an existing array in JOLT involves defining and applying the appropriate transformation rules in the JOLT specification (JOLT Spec). List to Map. For various reasons I need to 'stringify' the response using JOLT. This is an unofficial resource, created out of a personal initiative to fill the kn Mar 20, 2020 · Jolt transform convert large array to smaller array Asked 5 years ago Modified 4 years, 11 months ago Viewed 41 times Jul 31, 2024 · I need to remove duplicates from the below JSon, if there are duplicates in the closed Array, only one value should be retained. run "exp. I need unique identifier so that if this json packet arrays are exploded i can recreate the same arrays May 1, 2024 · I am using Jolt Transform to convert my input JSON. Start using node-json-transform in your project by running `npm i node-json-transform`. Learn how to use JOLT to transform nested arrays and objects in JSON. Input JSON: [ { "saleQty": 7, "returnQty": 8 } ] Jolt Spec: [ { "operation": " However, if the Expression Language is used in the transform, we may need a new Transform for each FlowFile. This value controls how many of those Transforms we cache in memory in order to avoid having to compile the Transform each time. If the array "list" is non-empty, then we pick the first component of the returning array through use of cardinality spec, deriving from the "list" object such as Feb 9, 2018 · Hey all, I'm trying to convert an array of arrays into an array of Objects. A new FlowFile is created with transformed content and is routed to the 'success' relationship. Transformer (JOLT) applications allow transformations of JSON through JOLT. apache. My input JSON is [ { "id": "1cca9371-b0f2-4c4d-9028-cd534edf Sep 20, 2018 · Hello @milosimpson , I was trying to convert the json from one JSON Format to another JSON Format using JOLT, But i'm not able to get the expected output. Additional Details Tags: json, jolt, transform, shiftr, chainr, defaultr, removr, cardinality, sort Apr 4, 2022 · In a Jolt transform Im trying to filter an array of objects by an id, if equal to an Id on a field outside of the array. However, if the Expression Language is used in the transform, we may need a new Transform for each FlowFile. Learn how to transform JSON arrays into nested objects using JOLT in Apache NiFi. Mar 8, 2023 · } ] } == current spec === // this currently only transforms the initial single saleStrategy object to an array called salesStrategies. Check the "Filter data from an Array, based on a leaf level value" example at the JOLT Demo online app. Custom Jolt Transformations (that implement the Transform interface) are supported. Nov 12, 2024 · I am using JOLTTransformJson Processor in Nifi. Discover the needed JOLT transformation and step-by-step guidance to achiev Oct 30, 2024 · If you want to make this more dynamic in terms of number of "courseSubCatgory", you can construct the array assignment string "#1|#2|#3" in some upstream processors and store the value as flow attribute (let says its called the same) , then you can make it more dynamic by using the flowfile attribute where the assignment of the Sep 8, 2022 · JOLT transform an array of objects with nested array of objects Asked 3 years, 1 month ago Modified 3 years, 1 month ago Viewed 597 times Aug 8, 2024 · How to get elements from array with Jolt Transform and make new attributes with their values in NiFi Asked 1 year, 2 months ago Modified 1 year, 2 months ago Viewed 56 times Jun 26, 2022 · This is input JSON which has array, which can contain one or more objects. Nov 17, 2023 · How to transform value in JSON array using JOLT? Asked 1 year, 10 months ago Modified 1 year, 10 months ago Viewed 74 times Aug 10, 2022 · 1 I have array of objects and I want to split each object from this array into two objects my input looks like this: Split array inside JSON with JOLT Asked 3 years, 6 months ago Modified 2 years, 5 months ago Viewed 1k times Jan 3, 2019 · I need to perform a Jolt transformation on the below example json: Input May 15, 2017 · You can still use RouteOnAttribute to route the flow files with missing values somewhere separate from the files that have all the values populated. Apr 10, 2019 · USING JOLT I need to convert the names in the tags array into a comma separated string set as tag. Mar 8, 2023 · == current spec === // this currently only transforms the initial single saleStrategy object to an array called salesStrategies. 4 days ago · This guide provides a comprehensive overview of using JOLT within Apache NiFi. Pretty Print: Apply pretty print formatting to the output of the Jolt transform (true or false). I have included the my work around below. I've already create a spec to convert my input data into the format below. Aug 29, 2022 · You'll need to complete a few actions and gain 15 reputation points before being able to upvote. Filter data from an Array, based on a leaf level value. 2, last published: 4 years ago. It's easy enough to use =concat to do this b May 10, 2019 · Nifi - Jolt Transform JSON Processor - Create a JSON array by utilizing few fields of exiting JSON and ignore the null attributes while constructing the array Jun 8, 2023 · Jolt Transform an Array Objects and Move Some Fields to Nested Array Asked 1 year, 8 months ago Modified 1 year, 8 months ago Viewed 312 times Feb 3, 2025 · I am trying to replace values of an array based on a lookup map using Jolt, but the spec does not seem to work. I want to flatten it. ---This video is based on the question https://s Jul 16, 2021 · I want to add the same values to every element of an array. Below is the input, expected output and JOLT used for generating the data. May 5, 2025 · This method allows us to ingest the file containing the array of JSON objects that require transformation, applying Jolt Transformation to each of the objects, and convert them to desired entity (Content in this example), and save it to database. Escaping Shiftr special chars. INPUT May 25, 2016 · Jolt transformation with nested arrays. Dec 2, 2019 · I am trying to transform array value as string to my object using jolt. It works till reaching the lookup map and I can shift the entire map, but referring t JoltTransformJSON Description: Applies a list of Jolt specifications to the flowfile JSON payload. So what do I need to do to transform an array of employee objects? This spec does what you want. Map to list. Convert 'prefix soup', to nested data. com Sep 23, 2024 · In this blog, I will walk you through some key JOLT operations and how to use the special operators &, *, @, $, #, along with transformation operations like shift, remove, and cardinality. How to transform the JSON using Jolt transformation expecting both scenarios as a input JSON without arr May 25, 2021 · I want to use a JOLT transformation to do two things: filter the elements in the array called myarray so that only elements remain which have a "v_518" attribute filter out all attribute Sep 8, 2021 · Jolt spec to parse and transform JSON array Asked 4 years, 2 months ago Modified 4 years, 2 months ago Viewed 2k times Oct 15, 2024 · Large Arrays: For large arrays, using with () is more efficient than creating a new array using the spread operator or the slice method. the "timestamp", to all these pairs. The scenario is that I am trying to solve for is that I want to wholly remove any values in the array whereby there is an Oct 30, 2024 · There are multiple ways of solving your problem as is - assuming you always want to replicate an existing field (s) against newly generated 3 elements array with default values of 1,2&3- , here is one of them: Aug 26, 2022 · I had asked a question previously: JOLT Transform : Extract and combine fields from multiple JSON arrays to single array output This is a bit different question, where the arrays can actually consist Aug 25, 2022 · JOLT Transform : Extract and combine fields from multiple JSON arrays to single array output Asked 3 years, 2 months ago Modified 3 years, 2 months ago Viewed 875 times Apr 20, 2022 · How do I transform an array using Jolt? Asked by Thaddeus Spence on 2022-04-20 JoltTransformJSON 2. Sep 8, 2022 · How do I write a jolt transform spec to iterate through a loop with multiple arrays? Asked 3 years, 2 months ago Modified 3 years, 2 months ago Viewed 722 times Learn how to use Jolt specifications to transform JSON arrays by nesting fields into arrays. Additional Details Tags: json, jolt, transform, shiftr, chainr, defaultr, removr, cardinality, sort Feb 11, 2023 · how to split the nested array in jolt transformation in apache nifi Labels: Apache NiFi sathish3389 Apr 2, 2021 · arrays jolt Follow this question to receive notifications edited Apr 7, 2021 at 7:43 Barbaros Özhan Mar 8, 2024 · Nifi JOLT Transform to remove JSON Object from JSON Array by element value Asked 1 year, 8 months ago Modified 1 year, 8 months ago Viewed 475 times Apr 21, 2024 · In my jolt spec its expecting customfield_10616 , so in my spec if you notice in the first shift Im using the expression *_* basically to make more dynamic but at least you have to have an underscore but if you think otherwise you can change it to whatever works for your data, for example you can change it to "customfield" , "customfield Oct 25, 2018 · JOLT transform flatten nested array with key value pairs Asked 6 years, 5 months ago Modified 6 years, 4 months ago Viewed 2k times Sep 7, 2022 · Jolt transform JSON key/value into String Array Asked 3 years, 2 months ago Modified 3 years, 2 months ago Viewed 413 times Sep 27, 2022 · Particularly since NiFi makes it a point to discuss Arrays and Maps in the documentation. update tags: "arrays" is unlikely to find experts Apr 30, 2021 · Jolt spec convert 2d array to 1d array Asked 3 years, 9 months ago Modified 3 years, 9 months ago Viewed 86 times Feb 3, 2022 · I am strugling a bit with my JoltTransform. Jul 12, 2023 · I am using JOLT to transform a JSON array to JSON array but flattening the inner string array list. Having an input JSON array, I need to transform it with JoltTransformJson (NiFi) and add a key-value for each item from a FlowFile attribute. { … Sep 7, 2023 · Jolt Transformation library Jolt Transformations (JsOn Language for Transform): When it comes to web services (especially RESTful web services), configuration files, or other data descriptors Sep 16, 2020 · converting array with single value into string value in JOLT Asked 5 years, 2 months ago Modified 2 years, 11 months ago Viewed 390 times Aug 31, 2020 · I need to use jolt transform to do the below JSON transformation. Input May 1, 2024 · To split each object in the input array into two separate objects and place them in the output array using JoltTransform, you can use the “modify-default-beta” operation in the Jolt specification with a combination of transformations. Transpose data in an Array. This is an unofficial resource, created out of a personal initiative to fill the kn However, if the Expression Language is used in the transform, we may need a new Transform for each FlowFile. Base case simple Transpose. Complex / nested Transpose. Need to split the "PID3" value in input Json to array of key value pairs in output Json Input JSON Nov 22, 2018 · AFAIK we cannot extract only the value using Jolt transform. But in my jolt spec, it is removing from both the level. Input: { "md": { "fn" Oct 14, 2018 · JOLT Transform Json Array while maintaining the Array structure Asked 6 years, 11 months ago Modified 1 year, 10 months ago Viewed 2k times Nov 16, 2019 · I have some JSON that contains two arrays that I would like to convert to key/value pairs. Feb 18, 2020 · I need to transform some flow files in NIFI and would like to use Jolt transforms. In the below example, the Closed Array contains PP21 two times, i want Jan 24, 2023 · Hello @Atul Gupta and welcome to StackOverflow. Asked 9 years, 5 months ago Modified 9 years ago Viewed 6k times May 18, 2018 · I want to transform a JSON into key-value pairs and simultaneously copy a specific single value, i. Article: In NIFI, JOLT Transformation can be used to help modifying a JSON object, the below code snippets are an example of how JOLT can be used to shift elements inside a JSON Object, in this case, the intention is to move and r May 18, 2020 · I need to transform a JSON response from one time-series DB and output it to as a response in a new format. 1 Here you can experiment with the stock Jolt Transforms without having to download and run the Java code. There are 25 other projects in the npm registry using node-json-transform. Learn how to effectively transform an array of objects with nested arrays using JOLT for JSON transformations. For that I'm trying to create a Jolt spec to convert my input Feb 16, 2023 · You can separate the cases by using two objects labeled "list" and "*" (else case) in which the "list" array is replicated whenever the array is empty. Here is an example of the first 3 recor Apr 2, 2025 · Discover how to leverage Jolt Transform to extract values from JSON and organize them into a clean array format. Mar 23, 2018 · I'm trying to convert one array of objects into output JSON without wrapper key in it using JOLT. You may also want to add the programming language you are using in tags, along with the file format. Mar 9, 2023 · == current spec === // this currently only transforms the initial single saleStrategy object to an array called salesStrategies. Is it possible to have the new flatten array and the original array within one jolt spec? This is the current structure Feb 7, 2019 · I'm trying to use Jolt to transform from a JSON array to another one. . Feb 18, 2022 · Created on 02-22-2022 03:44 AM - edited 02-22-2022 03:46 AM Thank you so much @araujo for the help. company. Apr 29, 2022 · Using Jolt transformations you can transform JSON to JSON using a JSON specification. Jun 24, 2020 · I am trying to create a combined jolt transform spec that can perform this conversion. e. I believe this answer might help you : How do I transform an array using Jolt?. On a match, apply a String default. 1. Aug 29, 2018 · Short Description: Using JOLT transformation to modify a JSON object. How can you use this in Apache NiFi? May 10, 2023 · If the array is empty I need to add a placeholder to the array, so this is the desired output: Jun 18, 2020 · How to use jolt to remove elements from JSON? Jacob Wilson 18. Dec 1, 2021 · I have to copy accounts to two level in the output. This guide explains a practical example with step-by-step instru Jun 7, 2021 · I have a situation where my only method for modifying an API response's data is JOLT. Modules containing custom libraries which do not existing on the current class path can be included via the custom module directory property. It works till reaching the lookup map and I can shift the entire map, but referring t Feb 3, 2025 · I am trying to replace values of an array based on a lookup map using Jolt, but the spec does not seem to work. It’s especially useful when dealing with complex transformations such as restructuring, renaming, or Feb 12, 2019 · How about putting the attribute to content by using AttributesToJson processor and then merging the two flow files by using MergeContent processor? Nov 19, 2023 · After using JOLT for many years now I still find myself fumbling my way into solutions, I am however stuck on the problem of how to selectively remove values from a JSON array. My approach is to use default to add the value. Sep 23, 2024 · JOLT (JSON to JSON Transformation) is a powerful framework for transforming JSON data. 06. Thanks for the Jolt transform because I spent a lot of time trying to get the Jolt transform to work and couldn't quite figure it out. Upvoting indicates when questions and answers are useful. For development and tests of all examples contained in this article, refer to the JOLT playground. 6. Feb 15, 2021 · Jolt converts list of Objects to Arrays Asked 4 years, 2 months ago Modified 4 years, 2 months ago Viewed 2k times Learn how to effectively use JOLT transformation in Apache NiFi to convert grouped fields from an array into respective individual arrays, achieving the desi Jul 21, 2023 · I need help in adding a unique identifier to my json packet nested arrays using jolt transform. extract first element array with Jolt Asked 5 years, 6 months ago Modified 5 years, 5 months ago Viewed 2k times Jun 29, 2022 · Jolt transform array to dissipate an outer attribute to each sub-object of an array Asked 2 years, 9 months ago Modified 2 years, 9 months ago Viewed 344 times Nov 21, 2023 · Solved: I am trying to transform a json using jolt where i am moving the array inside serviceCharacteristic to - 379309 Mar 6, 2020 · Jolt transformation for Array of objects to Concatenated string property based output #954 Jan 16, 2017 · Jolt may be implemented in Java, but a language tag "Jolt" can be understood as a reference to the Jolt DSL used to configure the transformations. Here is my input: [ [ "20190207101456", 1, 2, 3 ], [ Mar 16, 2021 · Jolt Transformation to move an attribute in each element of the array Asked 4 years, 8 months ago Modified 4 years, 1 month ago Viewed 2k times Dec 5, 2024 · Use JOLT transformation for normalizing JSON with arrays If you are using Apache Nifi for ELT processes, you may have a situation where you need to flatten JSON with an array like this example. Given this JSON : [ { - 353906 Apr 23, 2019 · EDIT (additional info): If the JOLT spec always puts the non-null value first (or all elements in the array will be null or identical), you might be able to add a spec to your chain that replaces the field value with the first element in its array. Input: tags : [ { "id" : "1", "name": "mobile", "slug": "" }, { "id Apr 22, 2025 · I have to convert an array of 2 arrays (numeric) into a single array with each element having one value from both arrays using JOLT Transform in Nifi. It is designed to help developers and data engineers efficiently transform JSON data, offering clear instructions and practical examples. Tags cardinality, chainr, default, jolt, json, remove, shift, sort, transform Input Requirement REQUIRED Supports Conversion of string to array in jolt transformation Asked 5 years, 5 months ago Modified 5 years, 5 months ago Viewed 4k times Jun 12, 2021 · I have a JSON that contains two arrays that I need to convert to key / value pairs. Here is my data { "position": { "positionManagerId". &3. Now I see what I was doing wrong. To achieve this extract the array from the json using ` EvaluateJsonPath ` processor Apr 14, 2021 · How can I transform a specific item in an array to integer? In the following example, I want only the 3rd element 456 to be converted to integer, and 123 to be left intact: input: { "arr&quo Sep 28, 2023 · In JSON input I get some times array and some times single object without array tag in json. I have been playing with this for a while and cannot figure out a transform that will work. Please format the title so it is a question (researchable, clear problem). Using the JOLT JSON transformation library. There are some nodes in my input JSON document that can come sometime as array of object I want to use Jolt to transform a JSON dataset. Apr 22, 2025 · I have to convert an array of 2 arrays (numeric) into a single array with each element having one value from both arrays using JOLT Transform in Nifi. This guide provides step-by-step instructions Jolt Transform Demo Using v0. Ideally, this will be done only once. 2020 Software Table of Contents [hide] 1 How to use jolt to remove elements from JSON? 2 How to transform an array using jolt in Java? 3 What is the output of a prefix sum array? 4 How to do jolt replace on all JSON keys? Feb 28, 2025 · In jolt transformation, I have the input JSON like this: { "MainObj": { "SubObj": { "listOfActivities": [ { "ActivityId": 1, Oct 19, 2024 · The Power of Jolt in Action Jolt’s strength lies in its ability to transform JSON data using a set of predefined operations, including: Shift: Move fields between objects within the JSON structure. May 4, 2022 · Jolt Transform: Single Value can't be added to an Array Asked 3 years, 6 months ago Modified 3 years, 6 months ago Viewed 615 times Oct 22, 2024 · I changed "Jolt Transform DSL" from "chain" to "default", as it eliminated the space that was there between the square brackets and the array elements in an array. [ { "name&q Nov 15, 2022 · Transform array to sub-values using jolt Asked 2 years, 5 months ago Modified 2 years, 5 months ago Viewed 35 times The shift and default transforms can’t handle that variability, so the CardinalityTransform was created to “fix” document, so that the rest of the transforms can assume “photos” will be an Array. Desired output above shows that If there is a saleStrategy array also present in the input JSON , then the spec needs to add the saleStrategy objects within that array to the salesStrategies output array as well . Step-by-step guide with code snippets and common mistakes. Learn how to effectively use JOLT spec to remove specific elements from a JSON array based on string matches. The problem is that my entire dataset is treated like an array because it is originally transformed from XML. Latest version: 1. And from one level, i need to remove fullAccountNumber. 6k Jul 16, 2018 · The " []" tell shift to make an array, and put your data at an array index, as opposed to the converting the array index int into a String to be a "key". ncnjx lel nrpfdnuf brcypww jhwhg equay gwtcktef bnmn jgdxhiu glfn yeurjw ccxh lmo ayye dvl