Service Modules > Scheduling and Optimization > Service Board > Service Board for Implementers > Post-Sync Configuration Tasks > About Objects, Fields, and Relationships > About Relationships > Configuring Inter-Field Dependencies
Configuring Inter-Field Dependencies
To configure inter-field dependencies:
1. In Max Designer, on the Developer Tools () launchpad menu, click Objects, and then in the list view, locate and open an object that has Relationship fields for which you want to specify dependencies.
2. On the record page, in the Code tab, in the Inter-Field Dependencies field, specify dependencies in valid JSON code, and then in the top left corner, click Save and Close ().
3. On the Development Actions () launchpad menu, click Synchronize.
Dependency Examples
These examples are for a scenario where the following objects and fields are created.
Object
Field
Field Full Identifier
Field Data Type
Target Object
Relationship Full Identifier
Customer
Name
dev_name
String
N/A
N/A
Country
dev_country
Relationship
Country
dev_customer_country
City
dev_city
Relationship
City
dev_customer_city
Country
Name
dev_name
String
N/A
N/A
City
Name
dev_name
String
N/A
N/A
Country
dev_country
Relationship
Country
dev_city_country
requiredFor Dependency Example
This example shows how to configure a requiredFor inter-field dependency that makes the City field editable only when the Country field has a value. This dependency is configured by implementing JSON in the Inter-Field Dependencies field of the Country field record.
{
    "requiredFor":{
        "dev_city":{
            "direction":"target",
            "relationship":"dev_city_country"
        }
    }
}
dependsOn One-Way Dependency Example
This example shows how to use dependsOn to configure a one-way inter-field dependency that makes the City field editable only when the Country field has a value, and makes the City field selectable only if the Country field value matches that of the Country field in the City field record. This dependency is configured by implementing JSON in the Inter-Field Dependencies field of the City field record.
* 
Before you implement the following code, be sure to clear the InterField Dependencies field in the Country object.
 
{
    "dependsOn":{
        "dev_country":{
            "direction":"source",
            "relationship":"dev_city_country"
        }
    }
}
dependsOn Two-Way Dependency Example
This example shows how to configure a two-way dependency between two editable fields, Country and City.
When the Country field has no configured value, all City fields are selectable. When a field value is configured for the Country field, it is selectable only if the value matches the Country field value in the City field record. The same is true for a City field, which is selectable only if the value matches the City field value in the Country field record. When the Country field value is cleared, the related City field value is automatically cleared also. The first part of this two-way dependency is configured by implementing JSON in the Inter-Field Dependencies field of the Country field record.
{
    "dependsOn":{
        "dev_city":{
            "bidirectional":true,
            "direction":"target",
            "relationship":"dev_city_country"
        }
    }
}
The second part of this two-way dependency is configured by implementing JSON in the Inter-Field Dependencies field of the City field record.
{
  "dependsOn": {
      "dev_country": {
          "bidirectional": true,
          "cascade": true,
          "direction": "source",
          "relationship": "dev_city_country"
      }
  }
}
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