`op: if`

Conditional branch — nested ops must be valid for the current phase.

Allowed phases

Phase	Status
`preflight`	✓ allowed
`core`	✓ allowed
`side_effects`	✓ allowed

Syntax

- op: if
  expr: "entity.cart.total > 100"
  then:
    - op: set
      path: /discount_rate
      value: 10
  else:
    - op: set
      path: /discount_rate
      value: 0

Parameters

Field	Required	Description
`expr`	yes	Condition expression string
`then`	yes	Ops when truthy
`else`	no	Ops when falsy

Behavior

Nested ops inside then/else must respect phase constraints (e.g. no set inside preflight).
Rule when: { expr: "..." } uses an object wrapper; array where: on filter/remove/find does not.

for_each · reject · stop

op: if

Allowed phases

Syntax

Parameters

Behavior

Related operations

See also

`op: if`