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AnyRules

Field Type Label Description
required bool optional Required specifies that this field must be set
in []string repeated In specifies that this field's type_url must be equal to one of the specified values.
notIn []string repeated NotIn specifies that this field's type_url must not be equal to any of the specified values.

BoolRules

Field Type Label Description
const bool optional Const specifies that this field must be exactly the specified value

BytesRules

Field Type Label Description
const bytes optional Const specifies that this field must be exactly the specified value
len uint64 optional Len specifies that this field must be the specified number of bytes
minLen uint64 optional MinLen specifies that this field must be the specified number of bytes at a minimum
maxLen uint64 optional MaxLen specifies that this field must be the specified number of bytes at a maximum
pattern string optional Pattern specifes that this field must match against the specified regular expression (RE2 syntax). The included expression should elide any delimiters.
prefix bytes optional Prefix specifies that this field must have the specified bytes at the beginning of the string.
suffix bytes optional Suffix specifies that this field must have the specified bytes at the end of the string.
contains bytes optional Contains specifies that this field must have the specified bytes anywhere in the string.
in []bytes repeated In specifies that this field must be equal to one of the specified values
notIn []bytes repeated NotIn specifies that this field cannot be equal to one of the specified values
ip bool optional Ip specifies that the field must be a valid IP (v4 or v6) address in byte format
ipv4 bool optional Ipv4 specifies that the field must be a valid IPv4 address in byte format
ipv6 bool optional Ipv6 specifies that the field must be a valid IPv6 address in byte format
ignoreEmpty bool optional IgnoreEmpty specifies that the validation rules of this field should be evaluated only if the field is not empty

DoubleRules

Field Type Label Description
const double optional Const specifies that this field must be exactly the specified value
lt double optional Lt specifies that this field must be less than the specified value, exclusive
lte double optional Lte specifies that this field must be less than or equal to the specified value, inclusive
gt double optional Gt specifies that this field must be greater than the specified value, exclusive. If the value of Gt is larger than a specified Lt or Lte, the range is reversed.
gte double optional Gte specifies that this field must be greater than or equal to the specified value, inclusive. If the value of Gte is larger than a specified Lt or Lte, the range is reversed.
in []double repeated In specifies that this field must be equal to one of the specified values
notIn []double repeated NotIn specifies that this field cannot be equal to one of the specified values
ignoreEmpty bool optional IgnoreEmpty specifies that the validation rules of this field should be evaluated only if the field is not empty

DurationRules

Field Type Label Description
required bool optional Required specifies that this field must be set
const google.protobuf.Duration optional Const specifies that this field must be exactly the specified value
lt google.protobuf.Duration optional Lt specifies that this field must be less than the specified value, exclusive
lte google.protobuf.Duration optional Lt specifies that this field must be less than the specified value, inclusive
gt google.protobuf.Duration optional Gt specifies that this field must be greater than the specified value, exclusive
gte google.protobuf.Duration optional Gte specifies that this field must be greater than the specified value, inclusive
in []google.protobuf.Duration repeated In specifies that this field must be equal to one of the specified values
notIn []google.protobuf.Duration repeated NotIn specifies that this field cannot be equal to one of the specified values

EnumRules

Field Type Label Description
const int32 optional Const specifies that this field must be exactly the specified value
definedOnly bool optional DefinedOnly specifies that this field must be only one of the defined values for this enum, failing on any undefined value.
in []int32 repeated In specifies that this field must be equal to one of the specified values
notIn []int32 repeated NotIn specifies that this field cannot be equal to one of the specified values

FieldRules

Field Type Label Description
message validate.MessageRules optional
float validate.FloatRules optional Scalar Field Types
double validate.DoubleRules optional
int32 validate.Int32Rules optional
int64 validate.Int64Rules optional
uint32 validate.UInt32Rules optional
uint64 validate.UInt64Rules optional
sint32 validate.SInt32Rules optional
sint64 validate.SInt64Rules optional
fixed32 validate.Fixed32Rules optional
fixed64 validate.Fixed64Rules optional
sfixed32 validate.SFixed32Rules optional
sfixed64 validate.SFixed64Rules optional
bool validate.BoolRules optional
string validate.StringRules optional
bytes validate.BytesRules optional
enum validate.EnumRules optional Complex Field Types
repeated validate.RepeatedRules optional
map validate.MapRules optional
any validate.AnyRules optional Well-Known Field Types
duration validate.DurationRules optional
timestamp validate.TimestampRules optional

Fixed32Rules

Field Type Label Description
const fixed32 optional Const specifies that this field must be exactly the specified value
lt fixed32 optional Lt specifies that this field must be less than the specified value, exclusive
lte fixed32 optional Lte specifies that this field must be less than or equal to the specified value, inclusive
gt fixed32 optional Gt specifies that this field must be greater than the specified value, exclusive. If the value of Gt is larger than a specified Lt or Lte, the range is reversed.
gte fixed32 optional Gte specifies that this field must be greater than or equal to the specified value, inclusive. If the value of Gte is larger than a specified Lt or Lte, the range is reversed.
in []fixed32 repeated In specifies that this field must be equal to one of the specified values
notIn []fixed32 repeated NotIn specifies that this field cannot be equal to one of the specified values
ignoreEmpty bool optional IgnoreEmpty specifies that the validation rules of this field should be evaluated only if the field is not empty

Fixed64Rules

Field Type Label Description
const fixed64 optional Const specifies that this field must be exactly the specified value
lt fixed64 optional Lt specifies that this field must be less than the specified value, exclusive
lte fixed64 optional Lte specifies that this field must be less than or equal to the specified value, inclusive
gt fixed64 optional Gt specifies that this field must be greater than the specified value, exclusive. If the value of Gt is larger than a specified Lt or Lte, the range is reversed.
gte fixed64 optional Gte specifies that this field must be greater than or equal to the specified value, inclusive. If the value of Gte is larger than a specified Lt or Lte, the range is reversed.
in []fixed64 repeated In specifies that this field must be equal to one of the specified values
notIn []fixed64 repeated NotIn specifies that this field cannot be equal to one of the specified values
ignoreEmpty bool optional IgnoreEmpty specifies that the validation rules of this field should be evaluated only if the field is not empty

FloatRules

Field Type Label Description
const float optional Const specifies that this field must be exactly the specified value
lt float optional Lt specifies that this field must be less than the specified value, exclusive
lte float optional Lte specifies that this field must be less than or equal to the specified value, inclusive
gt float optional Gt specifies that this field must be greater than the specified value, exclusive. If the value of Gt is larger than a specified Lt or Lte, the range is reversed.
gte float optional Gte specifies that this field must be greater than or equal to the specified value, inclusive. If the value of Gte is larger than a specified Lt or Lte, the range is reversed.
in []float repeated In specifies that this field must be equal to one of the specified values
notIn []float repeated NotIn specifies that this field cannot be equal to one of the specified values
ignoreEmpty bool optional IgnoreEmpty specifies that the validation rules of this field should be evaluated only if the field is not empty

Int32Rules

Field Type Label Description
const int32 optional Const specifies that this field must be exactly the specified value
lt int32 optional Lt specifies that this field must be less than the specified value, exclusive
lte int32 optional Lte specifies that this field must be less than or equal to the specified value, inclusive
gt int32 optional Gt specifies that this field must be greater than the specified value, exclusive. If the value of Gt is larger than a specified Lt or Lte, the range is reversed.
gte int32 optional Gte specifies that this field must be greater than or equal to the specified value, inclusive. If the value of Gte is larger than a specified Lt or Lte, the range is reversed.
in []int32 repeated In specifies that this field must be equal to one of the specified values
notIn []int32 repeated NotIn specifies that this field cannot be equal to one of the specified values
ignoreEmpty bool optional IgnoreEmpty specifies that the validation rules of this field should be evaluated only if the field is not empty

Int64Rules

Field Type Label Description
const int64 optional Const specifies that this field must be exactly the specified value
lt int64 optional Lt specifies that this field must be less than the specified value, exclusive
lte int64 optional Lte specifies that this field must be less than or equal to the specified value, inclusive
gt int64 optional Gt specifies that this field must be greater than the specified value, exclusive. If the value of Gt is larger than a specified Lt or Lte, the range is reversed.
gte int64 optional Gte specifies that this field must be greater than or equal to the specified value, inclusive. If the value of Gte is larger than a specified Lt or Lte, the range is reversed.
in []int64 repeated In specifies that this field must be equal to one of the specified values
notIn []int64 repeated NotIn specifies that this field cannot be equal to one of the specified values
ignoreEmpty bool optional IgnoreEmpty specifies that the validation rules of this field should be evaluated only if the field is not empty

MapRules

Field Type Label Description
minPairs uint64 optional MinPairs specifies that this field must have the specified number of KVs at a minimum
maxPairs uint64 optional MaxPairs specifies that this field must have the specified number of KVs at a maximum
noSparse bool optional NoSparse specifies values in this field cannot be unset. This only applies to map's with message value types.
keys validate.FieldRules optional Keys specifies the constraints to be applied to each key in the field.
values validate.FieldRules optional Values specifies the constraints to be applied to the value of each key in the field. Message values will still have their validations evaluated unless skip is specified here.
ignoreEmpty bool optional IgnoreEmpty specifies that the validation rules of this field should be evaluated only if the field is not empty

MessageRules

Field Type Label Description
skip bool optional Skip specifies that the validation rules of this field should not be evaluated
required bool optional Required specifies that this field must be set

RepeatedRules

Field Type Label Description
minItems uint64 optional MinItems specifies that this field must have the specified number of items at a minimum
maxItems uint64 optional MaxItems specifies that this field must have the specified number of items at a maximum
unique bool optional Unique specifies that all elements in this field must be unique. This contraint is only applicable to scalar and enum types (messages are not supported).
items validate.FieldRules optional Items specifies the contraints to be applied to each item in the field. Repeated message fields will still execute validation against each item unless skip is specified here.
ignoreEmpty bool optional IgnoreEmpty specifies that the validation rules of this field should be evaluated only if the field is not empty

SFixed32Rules

Field Type Label Description
const sfixed32 optional Const specifies that this field must be exactly the specified value
lt sfixed32 optional Lt specifies that this field must be less than the specified value, exclusive
lte sfixed32 optional Lte specifies that this field must be less than or equal to the specified value, inclusive
gt sfixed32 optional Gt specifies that this field must be greater than the specified value, exclusive. If the value of Gt is larger than a specified Lt or Lte, the range is reversed.
gte sfixed32 optional Gte specifies that this field must be greater than or equal to the specified value, inclusive. If the value of Gte is larger than a specified Lt or Lte, the range is reversed.
in []sfixed32 repeated In specifies that this field must be equal to one of the specified values
notIn []sfixed32 repeated NotIn specifies that this field cannot be equal to one of the specified values
ignoreEmpty bool optional IgnoreEmpty specifies that the validation rules of this field should be evaluated only if the field is not empty

SFixed64Rules

Field Type Label Description
const sfixed64 optional Const specifies that this field must be exactly the specified value
lt sfixed64 optional Lt specifies that this field must be less than the specified value, exclusive
lte sfixed64 optional Lte specifies that this field must be less than or equal to the specified value, inclusive
gt sfixed64 optional Gt specifies that this field must be greater than the specified value, exclusive. If the value of Gt is larger than a specified Lt or Lte, the range is reversed.
gte sfixed64 optional Gte specifies that this field must be greater than or equal to the specified value, inclusive. If the value of Gte is larger than a specified Lt or Lte, the range is reversed.
in []sfixed64 repeated In specifies that this field must be equal to one of the specified values
notIn []sfixed64 repeated NotIn specifies that this field cannot be equal to one of the specified values
ignoreEmpty bool optional IgnoreEmpty specifies that the validation rules of this field should be evaluated only if the field is not empty

SInt32Rules

Field Type Label Description
const sint32 optional Const specifies that this field must be exactly the specified value
lt sint32 optional Lt specifies that this field must be less than the specified value, exclusive
lte sint32 optional Lte specifies that this field must be less than or equal to the specified value, inclusive
gt sint32 optional Gt specifies that this field must be greater than the specified value, exclusive. If the value of Gt is larger than a specified Lt or Lte, the range is reversed.
gte sint32 optional Gte specifies that this field must be greater than or equal to the specified value, inclusive. If the value of Gte is larger than a specified Lt or Lte, the range is reversed.
in []sint32 repeated In specifies that this field must be equal to one of the specified values
notIn []sint32 repeated NotIn specifies that this field cannot be equal to one of the specified values
ignoreEmpty bool optional IgnoreEmpty specifies that the validation rules of this field should be evaluated only if the field is not empty

SInt64Rules

Field Type Label Description
const sint64 optional Const specifies that this field must be exactly the specified value
lt sint64 optional Lt specifies that this field must be less than the specified value, exclusive
lte sint64 optional Lte specifies that this field must be less than or equal to the specified value, inclusive
gt sint64 optional Gt specifies that this field must be greater than the specified value, exclusive. If the value of Gt is larger than a specified Lt or Lte, the range is reversed.
gte sint64 optional Gte specifies that this field must be greater than or equal to the specified value, inclusive. If the value of Gte is larger than a specified Lt or Lte, the range is reversed.
in []sint64 repeated In specifies that this field must be equal to one of the specified values
notIn []sint64 repeated NotIn specifies that this field cannot be equal to one of the specified values
ignoreEmpty bool optional IgnoreEmpty specifies that the validation rules of this field should be evaluated only if the field is not empty

StringRules

Field Type Label Description
const string optional Const specifies that this field must be exactly the specified value
len uint64 optional Len specifies that this field must be the specified number of characters (Unicode code points). Note that the number of characters may differ from the number of bytes in the string.
minLen uint64 optional MinLen specifies that this field must be the specified number of characters (Unicode code points) at a minimum. Note that the number of characters may differ from the number of bytes in the string.
maxLen uint64 optional MaxLen specifies that this field must be the specified number of characters (Unicode code points) at a maximum. Note that the number of characters may differ from the number of bytes in the string.
lenBytes uint64 optional LenBytes specifies that this field must be the specified number of bytes at a minimum
minBytes uint64 optional MinBytes specifies that this field must be the specified number of bytes at a minimum
maxBytes uint64 optional MaxBytes specifies that this field must be the specified number of bytes at a maximum
pattern string optional Pattern specifes that this field must match against the specified regular expression (RE2 syntax). The included expression should elide any delimiters.
prefix string optional Prefix specifies that this field must have the specified substring at the beginning of the string.
suffix string optional Suffix specifies that this field must have the specified substring at the end of the string.
contains string optional Contains specifies that this field must have the specified substring anywhere in the string.
notContains string optional NotContains specifies that this field cannot have the specified substring anywhere in the string.
in []string repeated In specifies that this field must be equal to one of the specified values
notIn []string repeated NotIn specifies that this field cannot be equal to one of the specified values
email bool optional Email specifies that the field must be a valid email address as defined by RFC 5322
hostname bool optional Hostname specifies that the field must be a valid hostname as defined by RFC 1034. This constraint does not support internationalized domain names (IDNs).
ip bool optional Ip specifies that the field must be a valid IP (v4 or v6) address. Valid IPv6 addresses should not include surrounding square brackets.
ipv4 bool optional Ipv4 specifies that the field must be a valid IPv4 address.
ipv6 bool optional Ipv6 specifies that the field must be a valid IPv6 address. Valid IPv6 addresses should not include surrounding square brackets.
uri bool optional Uri specifies that the field must be a valid, absolute URI as defined by RFC 3986
uriRef bool optional UriRef specifies that the field must be a valid URI as defined by RFC 3986 and may be relative or absolute.
address bool optional Address specifies that the field must be either a valid hostname as defined by RFC 1034 (which does not support internationalized domain names or IDNs), or it can be a valid IP (v4 or v6).
uuid bool optional Uuid specifies that the field must be a valid UUID as defined by RFC 4122
wellKnownRegex validate.KnownRegex optional WellKnownRegex specifies a common well known pattern defined as a regex.
strict bool optional This applies to regexes HTTP_HEADER_NAME and HTTP_HEADER_VALUE to enable strict header validation. By default, this is true, and HTTP header validations are RFC-compliant. Setting to false will enable a looser validations that only disallows \r\n\0 characters, which can be used to bypass header matching rules. Default: true
ignoreEmpty bool optional IgnoreEmpty specifies that the validation rules of this field should be evaluated only if the field is not empty

TimestampRules

Field Type Label Description
required bool optional Required specifies that this field must be set
const google.protobuf.Timestamp optional Const specifies that this field must be exactly the specified value
lt google.protobuf.Timestamp optional Lt specifies that this field must be less than the specified value, exclusive
lte google.protobuf.Timestamp optional Lte specifies that this field must be less than the specified value, inclusive
gt google.protobuf.Timestamp optional Gt specifies that this field must be greater than the specified value, exclusive
gte google.protobuf.Timestamp optional Gte specifies that this field must be greater than the specified value, inclusive
ltNow bool optional LtNow specifies that this must be less than the current time. LtNow can only be used with the Within rule.
gtNow bool optional GtNow specifies that this must be greater than the current time. GtNow can only be used with the Within rule.
within google.protobuf.Duration optional Within specifies that this field must be within this duration of the current time. This constraint can be used alone or with the LtNow and GtNow rules.

UInt32Rules

Field Type Label Description
const uint32 optional Const specifies that this field must be exactly the specified value
lt uint32 optional Lt specifies that this field must be less than the specified value, exclusive
lte uint32 optional Lte specifies that this field must be less than or equal to the specified value, inclusive
gt uint32 optional Gt specifies that this field must be greater than the specified value, exclusive. If the value of Gt is larger than a specified Lt or Lte, the range is reversed.
gte uint32 optional Gte specifies that this field must be greater than or equal to the specified value, inclusive. If the value of Gte is larger than a specified Lt or Lte, the range is reversed.
in []uint32 repeated In specifies that this field must be equal to one of the specified values
notIn []uint32 repeated NotIn specifies that this field cannot be equal to one of the specified values
ignoreEmpty bool optional IgnoreEmpty specifies that the validation rules of this field should be evaluated only if the field is not empty

UInt64Rules

Field Type Label Description
const uint64 optional Const specifies that this field must be exactly the specified value
lt uint64 optional Lt specifies that this field must be less than the specified value, exclusive
lte uint64 optional Lte specifies that this field must be less than or equal to the specified value, inclusive
gt uint64 optional Gt specifies that this field must be greater than the specified value, exclusive. If the value of Gt is larger than a specified Lt or Lte, the range is reversed.
gte uint64 optional Gte specifies that this field must be greater than or equal to the specified value, inclusive. If the value of Gte is larger than a specified Lt or Lte, the range is reversed.
in []uint64 repeated In specifies that this field must be equal to one of the specified values
notIn []uint64 repeated NotIn specifies that this field cannot be equal to one of the specified values
ignoreEmpty bool optional IgnoreEmpty specifies that the validation rules of this field should be evaluated only if the field is not empty

KnownRegex

Name Number Description
UNKNOWN 0
HTTP_HEADER_NAME 1 HTTP header name as defined by RFC 7230.
HTTP_HEADER_VALUE 2 HTTP header value as defined by RFC 7230.

File-level Extensions

Extension Type Base Number Description
rules FieldRules .google.protobuf.FieldOptions 1071
disabled bool .google.protobuf.MessageOptions 1071
ignored bool .google.protobuf.MessageOptions 1072
required bool .google.protobuf.OneofOptions 1071