# Migrate for Compute Engine V1 API - Class Google::Rpc::PreconditionFailure (v2.9.0)

2.9.0 (latest) 2.8.0 2.7.0 2.6.0 2.5.1 2.4.0 2.3.0 2.2.0 2.1.1 2.0.0 1.3.0 1.2.0 1.1.0 1.0.2 0.9.0 0.8.2 0.7.0 0.6.1 0.5.0 0.4.0 0.3.0 0.2.0 0.1.1 Reference documentation and code samples for the Migrate for Compute Engine V1 API class Google::Rpc::PreconditionFailure.

Describes what preconditions have failed.


<br />

For example, if an RPC failed because it required the Terms of Service to be
acknowledged, it could list the terms of service violation in the
PreconditionFailure message.

## Inherits

- Object

## Extended By

- Google::Protobuf::MessageExts::ClassMethods

## Includes

- Google::Protobuf::MessageExts

## Methods

### #violations

    def violations() -> ::Array<::Google::Rpc::PreconditionFailure::Violation>

**Returns**

- (::Array\<[::Google::Rpc::PreconditionFailure::Violation](https://docs.cloud.google.com/ruby/docs/reference/google-cloud-vm_migration-v1/latest/Google-Rpc-PreconditionFailure-Violation)\>) --- Describes all precondition violations.

### #violations=

    def violations=(value) -> ::Array<::Google::Rpc::PreconditionFailure::Violation>

**Parameter**

- **value** (::Array\<[::Google::Rpc::PreconditionFailure::Violation](https://docs.cloud.google.com/ruby/docs/reference/google-cloud-vm_migration-v1/latest/Google-Rpc-PreconditionFailure-Violation)\>) --- Describes all precondition violations.
**Returns**

- (::Array\<[::Google::Rpc::PreconditionFailure::Violation](https://docs.cloud.google.com/ruby/docs/reference/google-cloud-vm_migration-v1/latest/Google-Rpc-PreconditionFailure-Violation)\>) --- Describes all precondition violations.