Package resourcevalidator provides validators to express relationships between multiple attributes of a resource. For example, checking that multiple attributes are not configured at the same time.
These validators are implemented outside the schema, which may be easier to implement in provider code generation situations or suit provider code preferences differently than those in the schemavalidator package. Those validators start on a starting attribute, where relationships can be expressed as absolute paths to others or relative to the starting attribute.
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All returns a validator which ensures that any configured attribute value validates against all the given validators.
Use of All is only necessary when used in conjunction with Any or AnyWithAllWarnings as the Validators field automatically applies a logical AND.
package main
import (
"github.com/hashicorp/terraform-plugin-framework/resource"
"github.com/hashicorp/terraform-plugin-framework-validators/resourcevalidator"
)
func main() {
// Used inside a resource.Resource type ConfigValidators method
_ = []resource.ConfigValidator{
// The configuration must satisfy either All validator.
resourcevalidator.Any(
resourcevalidator.All( /* ... */ ),
resourcevalidator.All( /* ... */ ),
),
}
}
Any returns a validator which ensures that any configured attribute value passes at least one of the given validators.
To prevent practitioner confusion should non-passing validators have conflicting logic, only warnings from the passing validator are returned. Use AnyWithAllWarnings() to return warnings from non-passing validators as well.
package main
import (
"github.com/hashicorp/terraform-plugin-framework/resource"
"github.com/hashicorp/terraform-plugin-framework-validators/resourcevalidator"
)
func main() {
// Used inside a resource.Resource type ConfigValidators method
_ = []resource.ConfigValidator{
resourcevalidator.Any( /* ... */ ),
}
}
AnyWithAllWarnings returns a validator which ensures that any configured attribute value passes at least one of the given validators. This validator returns all warnings, including failed validators.
Use Any() to return warnings only from the passing validator.
package main
import (
"github.com/hashicorp/terraform-plugin-framework/resource"
"github.com/hashicorp/terraform-plugin-framework-validators/resourcevalidator"
)
func main() {
// Used inside a resource.Resource type ConfigValidators method
_ = []resource.ConfigValidator{
resourcevalidator.AnyWithAllWarnings( /* ... */ ),
}
}
AtLeastOneOf checks that a set of path.Expression has at least one non-null or unknown value.
package main
import (
"github.com/hashicorp/terraform-plugin-framework-validators/resourcevalidator"
"github.com/hashicorp/terraform-plugin-framework/path"
"github.com/hashicorp/terraform-plugin-framework/resource"
)
func main() {
// Used inside a resource.Resource type ConfigValidators method
_ = []resource.ConfigValidator{
// Validate at least one of the schema defined attributes named attr1
// and attr2 has a known, non-null value.
resourcevalidator.AtLeastOneOf(
path.MatchRoot("attr1"),
path.MatchRoot("attr2"),
),
}
}
Conflicting checks that a set of path.Expression, are not configured simultaneously.
package main
import (
"github.com/hashicorp/terraform-plugin-framework-validators/resourcevalidator"
"github.com/hashicorp/terraform-plugin-framework/path"
"github.com/hashicorp/terraform-plugin-framework/resource"
)
func main() {
// Used inside a resource.Resource type ConfigValidators method
_ = []resource.ConfigValidator{
// Validate that schema defined attributes named attr1 and attr2 are not
// both configured with known, non-null values.
resourcevalidator.Conflicting(
path.MatchRoot("attr1"),
path.MatchRoot("attr2"),
),
}
}
ExactlyOneOf checks that a set of path.Expression does not have more than one known value.
package main
import (
"github.com/hashicorp/terraform-plugin-framework-validators/resourcevalidator"
"github.com/hashicorp/terraform-plugin-framework/path"
"github.com/hashicorp/terraform-plugin-framework/resource"
)
func main() {
// Used inside a resource.Resource type ConfigValidators method
_ = []resource.ConfigValidator{
// Validate only one of the schema defined attributes named attr1
// and attr2 has a known, non-null value.
resourcevalidator.ExactlyOneOf(
path.MatchRoot("attr1"),
path.MatchRoot("attr2"),
),
}
}
PreferWriteOnlyAttribute returns a warning if the Terraform client supports write-only attributes, and the old attribute value is not null.
NOTE: This validator will produce persistent warnings for practitioners on every Terraform run as long as the specified non-write-only attribute has a value in the configuration. The validator will also produce warnings for users of shared modules who cannot immediately take action on the warning.
package main
import (
"github.com/hashicorp/terraform-plugin-framework/path"
"github.com/hashicorp/terraform-plugin-framework/resource"
"github.com/hashicorp/terraform-plugin-framework-validators/resourcevalidator"
)
func main() {
// Used inside a resource.Resource type ConfigValidators method
_ = []resource.ConfigValidator{
// Throws a warning diagnostic if the resource supports write-only
// attributes and the oldAttribute has a known value.
resourcevalidator.PreferWriteOnlyAttribute(
path.MatchRoot("oldAttribute"),
path.MatchRoot("writeOnlyAttribute"),
),
}
}
RequiredTogether checks that a set of path.Expression either has all known or all null values.
package main
import (
"github.com/hashicorp/terraform-plugin-framework-validators/resourcevalidator"
"github.com/hashicorp/terraform-plugin-framework/path"
"github.com/hashicorp/terraform-plugin-framework/resource"
)
func main() {
// Used inside a resource.Resource type ConfigValidators method
_ = []resource.ConfigValidator{
// Validate the schema defined attributes named attr1 and attr2 are either
// both null or both known values.
resourcevalidator.RequiredTogether(
path.MatchRoot("attr1"),
path.MatchRoot("attr2"),
),
}
}
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