Expressions

Boolean

5min

Within JSONata there are two types of Boolean expressions used to find out whether the result is true or false, namely:
﻿Boolean operators that include and, or
Boolean functions that include:
﻿$boolean()﻿
﻿$not()﻿
﻿$exists()﻿
Configuration
Result
Expression
(And)
Does the array of data contain both a name and an image? 
=$boolean(@ctx.datasources.employees.name and @ctx.datasources.employees.img)
(Or)
Does the array of data contain a phone number or email? 
=$boolean(@ctx.datasources.employees.phoneNumber or @ctx.datasources.employees.email)
(If value =)
If the name of the employee is "Mary Gomez", set true
[email protected] = "Mary Gomez" ? true :false
(If value <)
If the age of an employee is smaller than 20 set true. 
[email protected] < 20 ? true :false
(If array >)
Does the array of data contain more than two objects? 
=$count(@ctx.datasources.employees) > 2 ? true :false 
﻿
﻿Examples and code snippets ﻿
Evaluating fields
Boolean expression
﻿
This example evaluates static data in a component.enity to show the results in the entity field as a boolean.
See the full code sample in GitHub.
boolean.jigx
children:
  - type: component.entity
    options:
      children:
        - type: component.entity-field
          options:
            label: Does the array of data contain both a name and an image? (And)
            value: =$boolean(@ctx.datasources.employees.name and @ctx.datasources.employees.img)
        - type: component.entity-field
          options:
            label: Does the array of data contain a phone number or email? (Or)
            value: =$boolean(@ctx.datasources.employees.phoneNumber or @ctx.datasources.employees.email)
        - type: component.entity-field
          options:
            label: If name of employee is "Mary Gomez", set true. (If value =)
            value: [email protected] = "Mary Gomez" ? true :false
        - type: component.entity-field
          options:
            label: If age of employee is smaller than 20 set true. (If value <)
            value: [email protected] < 20 ? true :false
        - type: component.entity-field
          options:
            label: Does the array of data contain more than two objects? (If array >)
            value: =$count(@ctx.datasources.employees) > 2 ? true :false 
children:
  - type: component.entity
    options:
      children:
        - type: component.entity-field
          options:
            label: Does the array of data contain both a name and an image? (And)
            value: =$boolean(@ctx.datasources.employees.name and @ctx.datasources.employees.img)
        - type: component.entity-field
          options:
            label: Does the array of data contain a phone number or email? (Or)
            value: =$boolean(@ctx.datasources.employees.phoneNumber or @ctx.datasources.employees.email)
        - type: component.entity-field
          options:
            label: If name of employee is "Mary Gomez", set true. (If value =)
            value: =@ctx.datasources.employee.name = "Mary Gomez" ? true :false
        - type: component.entity-field
          options:
            label: If age of employee is smaller than 20 set true. (If value <)
            value: =@ctx.datasources.employee.age < 20 ? true :false
        - type: component.entity-field
          options:
            label: Does the array of data contain more than two objects? (If array >)
            value: =$count(@ctx.datasources.employees) > 2 ? true :false 
﻿
Placeholder
Example of writing a condition for a placeholder. If the number of objects in the array is greater than zero, the placeholder is not displayed. If it isn't and the field is empty, a placeholder will appear with the icon and the specified text. 
See the full code sample in GitHub.
See tips and tricks when using placeholders for additional information.
placeholder.jigx
placeholders:
  - when: =$count(@ctx.datasources.employees-dynamic) > 0 ? false :true 
    title: There is no data
    icon: missing-data
    
placeholders:
  - when: =$count(@ctx.datasources.employees-dynamic) > 0 ? false :true 
    title: There is no data
    icon: missing-data
    
﻿
Placeholder
﻿
﻿

Result	Expression
(And) Does the array of data contain both a name and an image?	=$boolean(@ctx.datasources.employees.name and @ctx.datasources.employees.img)
(Or) Does the array of data contain a phone number or email?	=$boolean(@ctx.datasources.employees.phoneNumber or @ctx.datasources.employees.email)
(If value =) If the name of the employee is "Mary Gomez", set true	[email protected] = "Mary Gomez" ? true :false
(If value <) If the age of an employee is smaller than 20 set true.	[email protected] < 20 ? true :false
(If array >) Does the array of data contain more than two objects?	=$count(@ctx.datasources.employees) > 2 ? true :false

Aggregation

Comparison Operators

Boolean

Configuration

﻿Examples and code snippets ﻿

Evaluating fields

Placeholder

Examples and code snippets