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 :



      Zoho Campaigns Resources


        • Desk Community Learning Series


        • Digest


        • Functions


        • Meetups


        • Kbase


        • Resources


        • Glossary


        • Desk Marketplace


        • MVP Corner


        • Word of the Day


        • Ask the Experts


          Zoho CRM Plus Resources

            Zoho Books Resources


              Zoho Subscriptions Resources

                Zoho Projects Resources


                  Zoho Sprints Resources


                    Zoho Orchestly Resources


                      Zoho Creator Resources


                        Zoho WorkDrive Resources



                          Zoho CRM Resources

                          • CRM Community Learning Series

                            CRM Community Learning Series


                          • Tips

                            Tips

                          • Functions

                            Functions

                          • Meetups

                            Meetups

                          • Kbase

                            Kbase

                          • Resources

                            Resources

                          • Digest

                            Digest

                          • CRM Marketplace

                            CRM Marketplace

                          • MVP Corner

                            MVP Corner




                            Zoho Writer Writer

                            Get Started. Write Away!

                            Writer is a powerful online word processor, designed for collaborative work.

                              Zoho CRM コンテンツ






                                ご検討中の方

                                  • Recent Topics

                                  • I have error AS101 when I try to add paypal@mydomain.com to Zoho

                                    Please help me with this. I tried to call the help line 4 times but don't get any response.

                                  • VAT on Multiple Expenses

                                    Firstly, might I say I am based in Ireland, and I'm not an accountant, and therefore my understanding of procedures could be somewhat limited. Scenario. An employee pays for items throughout a month, and therefore their claim for expenses includes multiple items - some of the items are VAT deductible (eg, an IT product) and some are not (eg, a client lunch). Discovery The odd thing in ZBooks, is that whilst it seems possible to add a VAT rate to a one-off item of expense, it is not possible to add

                                  • Detect and ignore bots in visitors

                                    The SalesIQ visitor numbers are basically useless to us because there is no bot detection. We get the same bots coming in from the same countries looking at the same pages every day. It can't be that difficult to tell the difference between an actual

                                  • Agent assignment filter?

                                    Godo day, We are starting to play with FSM to see if it's going to work for our needs. Now so far we have found that it's very restrcitve in the field department you you have layout rules or can't even hide fields depending on the users roles. We can't

                                  • Default tax type for mileage?

                                    Where we are, mileage includes a government tax. Is there any way to set a default tax for the Personal Car Mileage category of expense? (Or any other way?)

                                  • DKIM Now Mandatory - Changes to Zoho Forms Email Policies

                                    Hello Zoho Forms Users, This post is to inform you about an important update regarding the authentication of all email domains in your Zoho Forms account. This year, we are doubling down on our commitment to deliver a secure, seamless, and empowering

                                  • In arattai received message can't be deleted

                                    The issue has been noticed in following: arattai app (Android) arattai app (Window) arattai web While the message posted by me may be deleted, the ones received from others can't be. The item <Delete> change to <Report> when the message is a received

                                  • is it possible to add more than one Whatsapp Phone Number to be integrated to Zoho CRM?

                                    so I have successfully added one Whatsapp number like this from this User Interface it seems I can't add a new Whatsapp Number. I need to add a new Whatsapp Number so I can control the lead assignment if a chat sent to Whatsapp Phone Number 1 then assign

                                  • Kiosk Page Refresh

                                    We have a Kiosk running from a button in contacts to update values and also add related lists, which works great, but when the kiosk is finished the page does not refresh to show the changes. Is there a way to force the contact to refresh/update when

                                  • Tips & tricks: Make SalesIQ automations work for you

                                    Every day, thousands of visitors land on your website. Some browse, some buy, and some leave without a word. But, wouldn’t it be great if you could automatically know who’s interested, engage them at the right moment, and never miss a lead, and all this

                                  • Add Custom Reports To Dashboard or Home Tab

                                    Hi there, I think it would be great to be able to add our custom reports to the Home Tab or Dashboards. Thanks! Chad

                                  • Finding missing records

                                    I have a challenge and I am not really sure where to start with it. I can't find any similar threads on here, can anyone help: I have two forms, FormA and FormB. Both forms have records that contain a field called Job_Number. What I am trying to achieve

                                  • Digest Octobre - Un résumé de ce qui s'est passé le mois dernier sur Community

                                    Chers utilisateurs, Faisons le point sur les temps forts du mois d'octobre au sein de notre Community Zoho France. Partager des informations sensibles, comme des mots de passe, peut vite devenir compliqué et risqué. Les données circulent par email ou

                                  • How do I fully delete a user account

                                    Hi, I have two old accounts on my CRM which are inactive and show as 'Closed' in the list of users. BUT they are basically still there. How do I fully delete these accounts? They appear in some parts of CRM still such as the on the contact record emails

                                  • Automatically Add Recurring Zoho Meeting Events to Zoho Calendar / Zoho Meeting Calendar

                                    Hello Zoho Meeting Team, Hope you are doing well. We would like to request an enhancement regarding recurring meetings created inside Zoho Meeting. At the moment, when we schedule a recurring meeting in Zoho Meeting, it does not appear in Zoho Calendar

                                  • Credit Management: #6 Tackling Common Mistakes in Credit Based Billing

                                    Businesses extend credit to build relationships, make buying easy, and drive more sales. But somewhere between extending and collecting, things begin to slip. A few late payments here and there, an overlooked invoice, and a backlog make cash flow feel

                                  • Tasks Statuses

                                    Hi, The task status "Completed" is a final status which closes the task. We need to have a status "Cancelled". However, when the status is set to "Cancelled", the task prompt still has a blue button to Close Task. When the customer clicks that and closes

                                  • Updating Blueprint stage from my Deluge function

                                    Hi all, I need to update the blueprint stage. Its almost working, but ONLY if the current Deal stage is 'Closed Lost'. On any of my custom stages that Ive specified in the pipeline it doesnt work! My code: dealmap = Map(); deal_stage = deal.get("Stage");

                                  • Good news! Calendar in Zoho CRM gets a face lift

                                    Dear Customers, We are delighted to unveil the revamped calendar UI in Zoho CRM. With a complete visual overhaul aligned with CRM for Everyone, the calendar now offers a more intuitive and flexible scheduling experience. What’s new? Distinguish activities

                                  • Canvas: is it possible to have a fixed header?

                                    Hello. Does Canvas provide the option to have a fixed header, similar to the standard view? It would also be interesting for other parts of the interface, like the header or sidebar of the tab section. Thanks!

                                  • Replacing email ID,

                                    In zoho sheets If I am sending it as an email attachments can I replace sender email ID from notifications to my email ID.

                                  • Empowered Custom Views: Cross-Module Criteria Now Supported in Zoho CRM

                                    Hello everyone, We’re excited to introduce cross-module criteria support in custom views! Custom views provide personalized perspectives on your data and that you can save for future use. You can share these views with all users or specific individuals

                                  • Limited layout rules in a module

                                    There is a limit of 10 layout rules per module. Is there a way to get that functionality through different customization or workflow + custom function (easily accessible), etc. Having just 10 is limiting especially if module contains a lot of data. Are

                                  • Introducing Lead Capture: Empower exhibitors to capture leads effortlessly

                                    Events provide a great opportunity for exhibitors to generate awareness and engage with potential customers. Efficiently distributing attendee information to exhibitors through a seamless and secure way is of paramount importance. Introducing Lead Capture

                                  • dealing with post dated cheques

                                    Hi, can you help me please the best way to deal with this We sell an item of three months duration that is paid for with post dated cheques in monthly stages example - item is sold £3000 Cheque 1 is for £1000 due at time of sale (say Sept) cheque 2 is dated 25th of next month (Oct) cheque 3 is dated 25th of next month +1 (Nov) Now, with invoice number one it's simple - i send a standard invoice as usual But with the other two here's what i want zoho to do next month i want it to send an invoice on

                                  • Using Contains as a filter

                                    We are using Zoho Reports, ServiceDesk Plus analytics. I do not see how to create a report filter using Contains comparison of a string values, is one string contained in another. For example, Task Title contains the word Monitor. Is this possible in Zoho Reports?  This reporting feature is available in SDP reporting. Thanks in advance, Craig Rice

                                  • Mass import of documents into Zoho Writer

                                    I'm using Google's word processor at the moment but feel that Zoho does a better job (on the online apps market). Iwant to move my documents (about 50-70) to Zoho but it seems to me that I have to import them seperately. Is it already possible to upload several documents at a time or is this a forthcoming feature? Cheers Rolli :?:

                                  • Set off Unearned Revenue

                                    Hi, I would like to get a clarification on the below. I have an opening balance of BD.725/- in my Unearned Revenue A/c which includes the overpayments of 6 clients. No One of my clients settled his invoices by paying the value of the invoice less the

                                  • 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

                                  • Zoho Connect Module in Zoho Trident

                                    Hi I really like where Zoho Trident is going. Having Mail and Cliq in one place is especially powerful. However, Zoho Connect really needs to be included to make this a true communication and collaboration hub. I would like to request that Zoho Connect

                                  • Add Webhook Response Module to Zoho Flow

                                    Hi Zoho Flow Team, We’d like to request a Webhook Response capability for Zoho Flow that can return a dynamic, computed reply to the original webhook caller after / during the flow runs. What exists today Zoho Flow’s webhook trigger can send custom acknowledgements

                                  • Zoho Inventory - Managing Items With Multiple Suppliers

                                    Hi community, I'm working on a project at the moment for a car parts wholesale business. Each Item (part) has its own original manufacturer part number (sometimes more than one part number for the same item). When purchasing parts from 3rd party suppliers,

                                  • Fill Colors

                                    Hello, Just curious, is it possible to manage the Used and standard colors in the fill drop down menu ? I would like to change/edit them is possible to colors I frequently use. Thanks for you reply, Bruce

                                  • When moments in customer support get "spooky"

                                    It’s Halloween again! Halloween is celebrated with spooky symbols and meanings based on history and traditions, with each region adding its own special touch. While we were kids, we would dress up in costumes along with friends, attend parties, and enjoy

                                  • How can I delete duplicate transactions?

                                    I want to delete the duplicates not simply exclude them. I have duplicates, because I had automatic bank feeds turned on (had to make sure this critical functionality was working before migrating to Zoho). Now when I import my csv's exported from Wave,

                                  • Python - code studio

                                    Hi, I see the code studio is "coming soon". We have some files that will require some more complex transformation, is this feature far off? It appears to have been released in Zoho Analytics already

                                  • Multiple email addresses

                                    Multiple email addresses: I understand there is the ability to add an additional email field to a contact, but the functionality here needs to be drastically revised. Currently, this second email address does not log under the contact email history, nor is it available as a send address when using the Send Mail button within CRM. We recently migrated from GoldMine. I hate GoldMine, but there is one thing they did well: Email. I suggest copying them. Change the email field to an editable picklist,

                                  • Lead to Contact Conversion with multiple email address fields

                                    We are a B2C business with a strong repeat cycle, and as such it's not uncommon for customers to use multiple email addresses with us. We have both our Contacts & Leads modules set up with 3 email fields. (Primary Email / Secondary Email / Historic Email)

                                  • Move orders scan ISBN

                                    Hi We have ISBN setup to be searched in items zoho but move orders dissent recognize the ISBN is there q missing configuration? regards, JS

                                  • ViewID and Zoho Desk API

                                    I'm looking at the documentation for Listing contacts and it looks like you can filter by ViewID. I assume this is views created in a department or all departments. Is this correct? And if so, how do I find the ViewID for that view? EDIT: I see the view

                                  • Next Page