Kaizen #199: FAQs on Multi-Select Lookup (MxN) Field in Zoho CRM

Kaizen #199: FAQs on Multi-Select Lookup (MxN) Field in Zoho CRM

 Nearing 200th Kaizen Post – We want to hear from you!
Do you have any questions, suggestions, or topics you would like us to cover in future posts? Your insights and suggestions help us shape future content and make this series better for everyone. 

Hey everybody!!!
Welcome back to another post in the Kaizen series!
In this post, we will address some of the most frequently asked questions about the Multi-Select Lookup(MxN) field from the Zoho CRM developer community forum.

1. What is a Multi-select lookup field?

A multi-select lookup field in Zoho CRM lets you create a many-to-many relationship between two modules. This means a record in one module can be linked to multiple records in another module and vice versa.
For example, using an multi-select lookup field, you can associate multiple skills with an employee.

2. How does the Mutli-Select Lookup relationship work?

When you create a Multi-Select Lookup between two modules, for example, Employees and Skills, Zoho CRM automatically creates a hidden linking module, which is also known as an MxN module. This module stores the associations between records in the two modules, enabling you to track and manage many-to-many relationships.

For instance, if you link Employees and Skills, a linking module named EmpXSkills will be created.

This linking module is accessible only via API.

Backend Flow of multi-select lookup Relationship



In the linking module, two lookup fields (lookup fields with api names - Employees and Skills) will be created. The lookup fields, one pointing to Employees and the other pointing to Skills from the linking module, establish a connection between the linking module and its associated module.

Why you cannot use a lookup field for this use case? 
In Zoho CRM, a lookup field creates a one-to-many relationship between two modules i.e. one record in the source module can be linked to only one record in the target module.

Example :
If you create a lookup field for Skills in the Employees module, each employee can be linked to only one skill. So, use a multi-select lookup field instead of a lookup field when you need to represent complex relationships like one employee - many skills and one skill - many employees.

3. How to create a multi-select Lookup field using Zoho CRM APIs?

To create a Multi-Select lookup field between two modules using Zoho CRM APIs, follow these steps:

Step 1: Identify the Module API Name
Before creating the field, you should know the API names of the Employees and Skills modules. For that, use the Get Module Metadata API.  

Request URL  : {{api-domain}}/crm/v8/settings/modules
Request method : GET



Now, search for the Employees module in the response and note its API name.

Step 2: Use the Create Custom Fields API

To establish a many-to-many relationship between two modules, in our case, Employees and Skills, you need to create a custom field of type multi-select lookup in the Employees module (parent module).  Here, we will associate multiple skills to an employee.

This custom field requires:
  • The related module you want to link to - Skills.
  • A display field from the related module
  • The linking module (EmpXSkills), which stores the actual associations.
Use the Create Custom Fields API to create custom fields.

Request URL : {{api_domain}}/crm/v8/settings/fields?module=Employees
Request method : POST

Sample input :



{
    "fields": [
        {
            "field_label": "Skills", //Name of the field in your module
            "data_type": "multiselectlookup", //Type of the field
            "multiselectlookup": { //This JSON object contains the multi-select lookup relationship details

                "connected_details": { //Details about the module and field you want to link
                    "module": {
                        "api_name": "Skills" //API name of the related module
                    },
                    "field": {
                        "field_label": "Skills" //The field in the related module to display
                    }
                },
                "linking_details": { //Details about the junction or linking module that manages the many-to-many relationship
                    "module": {
                        "plural_label": "EmpXSkills" //Plural label of the junction module
                    }
                }
            }
        }
    ]
}

4. How Do You Find the Linking Module and Field API Names?

To know the API name of the linking module:
Use the Get Modules API and search for "generated_type" : "linking" in the response to identify MxN modules. In our case, EmpXSkills.

Request URL : {{api_domain}}/crm/v8/settings/modules
Request method : GET



To know the field API names in the linking module:
Use the Get Fields Metadata API to retrieve the API names of lookup fields within the linking module.

Request URL : {{api_domain}}/crm/v8/settings/fields?module=EmpXSkills
Request method : GET

5. How do I associate records via a multi-select lookup field using the Insert Records API in Zoho CRM?

To associate records using a multi-select lookup field, you must provide the record IDs from the related module. The association is made through the linking module.

Example :
Associating multiple skills with an employee using the multi-select lookup field.

Request URL : {{api-domain}}/crm/v8/Employees
Request method : POST

Sample input :


{
  "data": [
    {
      "Name": "Patricia",
      "Email": "patricia@mail.com",
      "Position": "Marketing Specialist",
      "Year_of_Experience": 5,
      "Skills": [   // API name of the multi-select lookup field in the Employees module
        {
          "Skills": { // API name of the lookup field in the linking module pointing to the Skills module
            "name": "Marketing",
            "id": "5725767000002149427"  //ID from the Skills module are mandatory to establish the link
          }
        },
        {
          "Skills": {
            "name": "Social Media Marketing",
            "id": "5725767000002149476"
          }
        }
      ]
    }
  ]
}


6. How do I associate an Employee's skills using the linking module in Zoho CRM?

To establish a relationship between the Employees and Skills modules through the linking module, use the Insert Records API to create a record in the linking module, EmpXSkills.

To do this,
  • Use the appropriate lookup field API names to reference the parent module.
  • You must need the record IDs from both the Employees and Skills modules to create the associations.
Request URL : {{api-domain}}/crm/v8/EmpXSkills
Request method : POST

Sample input :


{
  "data": [
    {
      "Name": "Patricia",
      "Employees": {
        "id": "5725767000002161001"  // Record ID from the Employees module
      },
      "Skills": {
        "id": "5725767000002149476"  // Record ID from the Skills module
      }
    }
  ]
}


7. When should I use create/update operations in the Employees module vs the EmpXSkills module?

                Employees Module

               EmpXSkills (linking) Module

Use when you want to create or update an Employee and associate Skills using the Multi-select Lookup field.

Use when you want to create or remove associations between existing Employee and Skill records without modifying the actual Employee or Skill data.

Creating a new employee and assigning their skills at once.

Managing relationships between existing records i.e., linking and unlinking skills to employees.


8. How to update a record in the linking module?

To update a record in the linking module, use the Update Records API.
Request URL : {{api-domain}}/crm/v8/EmpXSkills/5725767000006269044
Request method : PUT

Sample input :


{
    "data": [
        {
            "Skills": {
                "name": "Marketing",
                "id": "5725767000002170035" //Associating another skill with the employee 
            }
        }
    ]
}
In the above sample, we have replaced an existing skill associated with an employee with another Skill in the linking module.This is done by updating the Skills lookup field in the EmpXSkills record.

Please note that in the linking module, Skills is a lookup field, so you can associate only one skill per linking record. But in the Employees module, Skills is a multi-select lookup field, so an employee can be associated with multiple skills.

9. How to unlink records from the parent module as well as the linking module?

Unlink the associated records from the parent module:

Using the Update records API, you can remove an associated skill from an employee, use the "_delete": null key within the multi-select lookup field in the Employee record update.

Request URL : {{api-domain}}/crm/v8/Employees/5725767000006269044
Request method : PUT

Sample input :

{
"data": [
        {
            "Skills": [
               {
                    "Skills": {
                        "name": "Marketing", 
                        "id": "5725767000002170035" // The Skill record you want to unlink
                    },
                    "id": "5725767000007228047", //record ID - The record created in the linking module for the employee with the Marketing skill
                    "_delete" : null 
                }
            ]
        }
    ]
}

Replace an associated record from the linking module:

Use the Update Records API to replace an existing association in the linking module.

Request URL : {{api-domain}}/crm/v8/EmpXSkills/5725767000007228035
Request method : PUT

Sample input :


{
    "data": [
        {
            "Skills": {
                "name": "Java",
                "id": "5725767000005259075" //replacing a new skill 
            }
        }
    ]
}
In the above sample, we have replaced the existing skill with Java.

10. Why am I seeing the error "DUPLICATE_LINKING_DATA"  in the Update Records API? 

This error occurs when you try to associate records with the parent record that are already linked with the Multi-select lookup field. To resolve this, check the records you are trying to link and make sure your association is only with records that are not already linked.

Know your existing linked records:

Before the Update Records API, use the Get Related Records Data API and search for the multi-select lookup field. In our case, Skills is the multi-select lookup field created in the Employees module. This will return all records already associated.

Example :


The response returns all Skills already linked with that Employee.

Using this way, compare the IDs from the API response with the new records you are about to link, and only proceed with non-duplicate IDs. This avoids duplicate entries and prevents the "DUPLICATE_LINKING_DATA" error.

11. What happens if I delete a record in the linking module?

When you delete a record in the linking module, it only removes the association between the related records in the Employees and Skills modules.

Note :
  • Deleting a linking module record removes only the relationship between two records from the Employees and Skills modules.
  • Deleting an Employee or Skill record deletes all corresponding entries in the linking module as well.

12. How do I query linked records?

Use the COQL API to query multi-select lookup data by specifying the corresponding linking module's API name directly in your query. The linking module is treated as a separate module in Zoho CRM, so you can retrieve associated records by querying it like any other module.

Sample query :


{
  "select_query": "select Skills.Name as skill, Employees.Name as employee from EmpXSkills where Skills.Name like '%Marketing%'"
}

Use the Get Module Metadata API to know the linking module's API name.

13. How do I export multi-select lookup records using the Bulk Read API?

To export multi-select lookup data, linking module records efficiently, use the Bulk Read API with the linking module’s API name.

Request method : POST

Sample Request :


{
    "callback": {
        "method": "post"
    },
    "query": {
        "module": {
            "api_name": "EmpXSkills" //API name of the linking module
        },
        "fields": [
            "Employees.Name",
            "Employees.Year_of_Experience",
            "Skills.Name"
        ],
        "criteria": {
            "group": [
                {
                    "field": {
                        "api_name": "Employees.Year_of_Experience" 
                    },
                    "comparator": "greater_than",
                    "value": "4"
                },
                {
                    "field": {
                        "api_name": "Skills.Name"
                    },
                    "comparator": "contains",
                    "value": "Social"
                }
            ],
            "group_operator": "AND"
        }
    }
}

14. Can I import my linking module's data using the Bulk Write API?

Yes. Like the Leads and Contacts modules, you can also import linking module's data into Zoho CRM using the Bulk Write API by directly specifying the linking module’s API name.

If you are importing data that involves both a parent module, Employees and its associated MxN linking module, follow these steps:

1. Create separate CSV files:
  • One for the parent module - Employees
  • One for the linking module - EmpXSkills
2. Zip the files into a single ZIP file.
3. Upload the ZIP in a single Bulk Write API request.
4. Ensure accurate field mappings are provided in the API request body.

Refer to Kaizen #131 - Bulk Write for parent-child records using Scala SDK for more details on handling parent-child records.


15. Can I receive notifications if a multi-select lookup field in a module is modified or updated?

Yes, you can receive notifications when a MxN field is updated using the Notification API. To enable instant notifications for actions performed in a module, use the respective API names of the linking module in the input body.

Request method : POST

Sample input :


{
    "watch": [
        {
            "channel_id": "10000",
            "events": [
                "EmpXSkills.all"  //EmpXSkills represents the API name of the linking module
            ],
            "return_affected_field_values": true  
        }
    ]
}

16. Can I use criteria-based filtering when accessing multi-select lookup data using the Search API?

Yes, you can filter multi-select lookup data using the criteria parameter in the Search API's URL.

Here is an example that fetches records from the EmpXSkills linking module.

Request URL : {{api-name}}/crm/v8/EmpXSkills/search?criteria=((Secondary_Email:equals:patricia@mail.com)and(Skills:equals:Content_Marketing))
Request method : GET

Sample response :



                                                                                                                               x-----------------------------x


We trust that this post meets your needs and is helpful. Let us know your thoughts in the comment section or reach out to us at support@zohocrm.com 

Stay tuned for more insights in our upcoming Kaizen posts!


Other FAQs in the Kaizen series :


    • Recent Topics

    • How to sync from Zoho Projects into an existing Sprint in Zoho Sprints?

      Hi I have managed to integrate Zoho Projects with Zoho Sprints and I can see that the integration works as a project was created in Zoho Sprints. But, what I would like to do is to sync into an existing Zoho Sprints project. Is there a way to make that

    • Online Assessment or any aptitude test

      This video is really helpful! I have one question — if I share an assessment form link (through email or with the application form on my career page), how does Zoho Recruit evaluate it? Can a candidate use Google or external help while taking the test,

    • How Zoho Desk contributes to the art of savings

      Remember the first time your grandmother gave you cash for a birthday or New Year's gift, Christmas gift, or any special day? You probably tucked that money safely into a piggy bank, waiting for the day you could buy something precious or something you

    • Editing the Ticket Properties column

      This is going to sound like a dumb question, but I cannot figure out how to configure/edit the sections (and their fields) in this column: For example, we have a custom "Resolution" field, which parked itself in the "Ticket Information" section of this

    • Need a way to secure Prefill URLs in Zoho Forms (hide or encrypt prefilled values)

      Hi everyone, I often use Zoho Forms with prefilled URLs to simplify the user experience — for example: https://forms.zohopublic.com/.../form?Name=David&Amount=300 However, the problem is that all prefilled values are visible and editable in the link.

    • Incoming Threads Report

      From data to decisions: A deep dive into ticketing system reports Customers raise questions and issues through multiple channels, such as email, chat, or tickets. To monitor the number of queries received on a specific day from each channel, leads can

    • Conditional layouts - support for multi-select picklists

      Hi, The documentation for conditional layouts says the following: "Layout Rules cannot be used on the following field types: Auto Number Lookup Multi Select Lookup User Lookup Formula File Upload Multi Line" I have a custom module with a multi-pick list

    • Samsung Keyboard Issues with Notebook

      Dear Users, We're sorry to inform you that some of our users are experiencing certain issues like scrolling, delay/lag, cursor placement especially within the text notes. This occurs mainly due to Samsung Keyboard compatibility with Android 13 and some

    • How to apply customized Zoho Crm Home Page to all users?

      I have tried to study manuals and play with Zoho CRM but haven't found a way how to apply customized Zoho CRM Home Page as a (default) home page for other CRM users.. How that can be done, if possible? - kipi Moderation Update: Currently, each user has

    • Cloudflare Turnstile is now available in Zoho Forms!

      Hello form builders! We have added a new layer of protection to help you keep your forms free from bots. Instead of forcing users to prove they are human, Cloudflare Turnstile quietly checks browser signals in the background. Your real users glide through,

    • Power of Automation :: Unique Task & Issue Prefix Format and Sequencing Rule

      Hello Everyone, A custom function is a software code that can be used to automate a process and this allows you to automate a notification, call a webhook, or perform logic immediately after a workflow rule is triggered. This feature helps to automate

    • 【Zoho CRM】キャンバス機能のアップデート

      ユーザーの皆さま、こんにちは。コミュニティチームの藤澤です。 今回は「Zoho CRM アップデート情報」の中から、キャンバス機能のアップデートをご紹介します。 目次 グリッドについて フォーム表示のタブについて 1. グリッドについて ビジュアルデザインは細部の調整に手間がかかりますが、キャンバスのグリッドを使えば要素を整理し、バランスよく配置できます。 画像やデータなどの要素をグループ化せずに簡単に配置できます。 余白を調整することで、要素間の視覚的なバランスを保つのに役立ちます。 「表示切り替え基準の幅」を設定すると、デザインをレスポンシブに調整できます。

    • Deleting unwanted ticket replies

      Hello, In a Zoho Desk Ticket thread, sometimes one of the recipients has auto-reply activated. This creates a new message in the Ticket thread that not only pollutes the thread, but most importantly cannot be replied properly because usually auto-reply e-mails don't do "reply all", so the other recipients are not included. I want to delete such a message in the Ticket thread. I searched the help of Zoho Desk, but only found a way to mark as Spam (https://help.zoho.com/portal/kb/articles/marking-support-tickets-as-spam)

    • Issue: Ticket Export Does Not Include Ticket Threads

      Dear Zoho Desk Support Team, I hope you’re doing well. I wanted to bring to your attention that the current ticket export feature in Zoho Desk does not seem to include the ticket threads or conversation history. When exporting tickets, only the summary

    • Ability to Set Client Name During Portal Invitation

      Hi Zoho Team, We would like to suggest an important enhancement to the Zoho Creator Client Portal functionality. Zoho Creator recently introduced the option to set a client’s display name in the Client Portal settings, which is very helpful for creating

    • スマホでキャンペンメールを見ると正しく表示されない

      キャンペーンのメール（HTML）を作成しましたが、スマホ表示に切り替えると正しく表示されません（添付参照）過去に作成したキャンペーンでは特に意識してませんでしたが、問題なく表示されていたようです。うまく表示される場合とされない場合の違いは何でしょうか？

    • 136.143.188.51 blocked by spamcop

      Zoho mailserver seems to be blocked by spamcop. Cant send mail to my customer. Not sure what to do.

    • Zoho Calendar Integrated Into CRM?

      I've searched around the forums but couldn't find anything addressing this . . .  Is there a plan to integrate Zoho's stand alone calendar solution into Zoho CRM?  The CRM calendar does an OK job but is very basic and the Zoho calendar is great, but I've only figured out to subscribe to my CRM calendar within ZCalendar - there is no 2-way sync. My preferred solution would be for ZCal to become the default calendar/event solution within Z CRM. Is this on the roadmap? Thanks

    • Can I Create Different Page Layouts Based on a Specified Module Pick List Field

      I am trying to work out how to create different page layouts based on a specified module pick list field value, like the Salesforce feature where you can define multiple record types and then create custom page layouts for each record type. This is a super important feature as for almost all the modules we are using (Leads, Potentials, Accounts) we need to be able only show fields relevant to the record type. E.g. We need a very different page layout for a consumer lead Vs a commercial lead, same

    • Scheduling Tasks in Relation to Project End Date

      I use Zoho project  to help manage tasks that relate to a number of specific business events that take place.  I would like to be able to have my project end date be the date of the event and then work "back" from that date to say...   Add a task 2 weeks before the project end date to remind me to XYZ.  Does anyone know if there is a way to base task timings back from a project due date rather than a project start date?

    • What formula to use in computing total hrs and decimal hrss

      So , my data includes log im column , 2 breaks with 2 columns that says back and lunch and 1 column that says back and logged out. What formula should i use to be able to automatically have my total hours as I input time in each column? Thankyou

    • Notes of Tasks in Zoho CRM

      Hello, Is there a way to filter the Notes that appear on a Task to only show the notes related to that specific Task and not display all the Notes of the objects related to that Task (Accounts, Contacts, Deal, etc). In essence, our team struggles to understand

    • Passing the CRM

      Hi, I am hoping someone can help. I have a zoho form that has a CRM lookup field. I was hoping to send this to my publicly to clients via a text message and the form then attaches the signed form back to the custom module. This work absolutely fine when

    • How to next stage blueprint in Zoho Creator

      Hello, I have question, its possible to next stage blueprint? in case, Start - (first stage) Leader 1 (with condition 1) - (second stage) Leader 2 (with condition 2) - (third stage) Leader 3 (with condition 3) - (fourth stage) After first stage, i want

    • Feature Request: Email Follow-Up Sequences Similar to Zoho CRM

      I’m wondering if Zoho Recruit is planning to introduce a feature similar to the Email Automation – Follow-Up Sequences that is available in Zoho CRM. In CRM, this allows users to send a series of timed follow-up emails triggered by specific actions (for

    • Duplicated Notebooks

      Out of the blue, almost all of my notebooks got duplicated and the different copies contain different information. Some seem like older copies than the others. I use the linux desktop app and sometimes the Android app. I assume that the sync failed at some point and was unable to merge the two versions together. But I'm afraid to add anything else to my notebook because if it can't properly sync 5 notebooks with only a handful of notes each, what will happen when I have hundreds of notes and I lose

    • Currency limitation when integrating Zoho CRM & Zoho Books

      Brief Video of Problem: https://www.loom.com/share/d61d1d07d0904e149d80c1901a22418e. Background ·       Our business is based in Australia and we have to have Zoho Books in AUD to comply with tax and reporting regulations in Australia. ·       We sell

    • Multi-select Lookup does not have Advanced filter options in CRM

      With much fanfare Zoho announced the advanced filter options for CRM lookup fields which was a nice addition. This feature is not available for Multi-Select lookup fields. Will it be rolled out in the next 3-6 months, considering the standard lookup filter

    • Experience effortless record management in CRM For Everyone with the all-new Grid View!

      Hello Everyone, Hope you are well! As part of our ongoing series of feature announcements for Zoho CRM For Everyone, we’re excited to bring you another type of module view : Grid View. In addition to Kanban view, List view, Canvas view, Chart view and

    • Unable to copy into a new document

      Whe I create a new Writer doc and attemp to copy and past I get this message. The only way to copy into a document is I duplicate an existing document, erase the text and save it under a different name and then paste the information. Not ideal. Can you

    • Kaizen #157: Flyouts in Client Script

      Hello everyone! Welcome back to another exciting edition of our Kaizen series, where we explore fresh insights and innovative ideas to help you discover more and expand your knowledge!In this post, we'll walk through how to display Flyouts in Client Script

    • Customize User Invites with Invitation Templates

      Invitation Templates help streamline the invitation process by allowing users to create customized email formats instead of sending a one-size-fits-all email. Different invitation templates can be created for portal users and client users to align with

    • Admin Control Over Profile Picture Visibility in Zoho One

      Hello Zoho Team, We hope you are doing well. Currently, as per Zoho’s design, each user can manage the visibility of their profile picture from their own Zoho Accounts page: accounts.zoho.com → Personal Information → Profile Picture → Profile Picture

    • Published Course Not Reflecting In Hub

      Hi! I am trying to create micro-learning courses for our team to be available for self-guided learning. I have published the courses with enrollment settings open to all users of the hub, but they don't appear to be available for enrollment. Am I missing

    • Unlock Locked Users via Zoho One Mobile App

      Hello Zoho One Team, We have noticed that in the Zoho One web admin panel, we can unlock a locked user when needed. However, when using the Zoho One mobile app, there is no indication that a user is locked, nor is there an unlock button similar to what

    • Tip #47- Stay Ahead with Automated Scheduled Reports in Zoho Assist- 'Insider Insights'

      We’ve made it easier for you to stay informed, even when you’re busy managing remote sessions! With Scheduled Reports in Zoho Assist, you can now automatically receive detailed insights about your remote support and unattended access activities directly

    • Colour Coded Flags in Tasks Module List View

      I really like the colour coded flags indicating the status of the tasks assigned to a Contact/Deal in the module list view. It would be a great addition to have this feature available in the list view of activities/tasks. I understand you have the Due

    • Uploading data to S3

      Has anyone successfully uploaded data from Creator to S3 using the InvokeURL command or any other method in Deluge? (keywords: S3, AWS, Amazon, bucket)

    • UPS Label size when generated via Zoho

      We've integrated UPS with Zoho inventory. When creating and downloading the shipping labels they are created in a larger paper size. I'd like them to be generated to print on a 4x6 printer. Zoho have told me I need to do this within our UPS portal. UPS

    • Credit Management: #4 Credits on Unused Period

      Recall a familiar situation. You sign up for a monthly gym membership. You pay the subscription fee upfront, get motivated, and show up consistently for the first week. Then, suddenly, you get caught up in work deadlines, travel plans, or a dip in motivation.

    • Next Page