Enum Annotation 

#[non_exhaustive]
pub enum Annotation {
    AutoCreateTime,
    AutoUpdateTime,
    AutoIncrement,
    Choices(Vec<String>),
    DefaultValue(DefaultValue),
    Index(Option<IndexValue>),
    MaxLength(i32),
    NotNull,
    PrimaryKey,
    Unique,
    ForeignKey(ForeignKey),
}

The subset of annotations which need to be communicated with the migration tool

Variants (Non-exhaustive)

Non-exhaustive enums could have additional variants added in future. Therefore, when matching against variants of non-exhaustive enums, an extra wildcard arm must be added to account for any future variants.

AutoCreateTime

Only for DbType::Timestamp, DbType::DateTime, DbType::Time and DbType::Date. Will set the current time of the database when a row is created.

AutoUpdateTime

Only for DbType::Timestamp, DbType::DateTime, DbType::Time and DbType::Date. Will set the current time of the database when a row is updated.

AutoIncrement

AUTO_INCREMENT constraint

Choices(Vec<String>)

A list of choices to set

DefaultValue(DefaultValue)

DEFAULT constraint

Index(Option<IndexValue>)

Create an index. The optional IndexValue can be used, to build more complex indexes.

MaxLength(i32)

Specifies the maximum length of the column’s content.

It is part of the column’s type for a DbType::VarChar and a check constraint for a DbType::Text. Everywhere else, and in sqlite entirely, it is ignored - sqlite has no varchar and never enforces a string’s length.

NotNull

NOT NULL constraint

PrimaryKey

The annotated column will be used as primary key

Unique

UNIQUE constraint

ForeignKey(ForeignKey)

Foreign Key constraint

Trait Implementations

impl Clone for Annotation

fn clone(&self) -> Annotation

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for Annotation

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for Annotation

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Eq for Annotation

impl Hash for Annotation

fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl PartialEq for Annotation

fn eq(&self, other: &Annotation) -> bool

Equality operator ==.

fn ne(&self, other: &Rhs) -> bool

Inequality operator !=.

impl Serialize for Annotation

fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl StructuralPartialEq for Annotation