Struct Json

pub struct Json;

The JSON SQL type. This type can only be used with feature = "serde_json"

For postgresql you should normally prefer Jsonb instead, for the reasons discussed there.

ToSql impls

• serde_json::Value

FromSql impls

• serde_json::Value

Trait Implementations

impl<'__expr, '__expr2> AsExpression<Json> for &'__expr2 &'__expr Value

Available on crate feature serde_json and (crate features postgres_backend or mysql_backend) only.

type Expression = Bound<Json, &'__expr2 &'__expr Value>

The expression being returned

fn as_expression(self) -> Self::Expression

Perform the conversion

impl<'__expr> AsExpression<Json> for &'__expr Value

Available on crate feature serde_json and (crate features postgres_backend or mysql_backend) only.

type Expression = Bound<Json, &'__expr Value>

The expression being returned

fn as_expression(self) -> Self::Expression

Perform the conversion

impl AsExpression<Json> for Value

Available on crate feature serde_json and (crate features postgres_backend or mysql_backend) only.

type Expression = Bound<Json, Value>

The expression being returned

fn as_expression(self) -> Self::Expression

Perform the conversion

impl Clone for Json

fn clone(&self) -> Json

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for Json

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

Formats the value using the given formatter.

impl Default for Json

fn default() -> Json

Returns the “default value” for a type.

impl FromSql<Json, Mysql> for Value

Available on crate features serde_json and mysql_backend only.

fn from_sql(value: MysqlValue<'_>) -> Result<Self>

See the trait documentation.

fn from_nullable_sql(bytes: Option<DB::RawValue<'_>>) -> Result<Self>

A specialized variant of from_sql for handling null values.

impl FromSql<Json, Pg> for Value

Available on crate features serde_json and postgres_backend only.

fn from_sql(value: PgValue<'_>) -> Result<Self>

See the trait documentation.

fn from_nullable_sql(bytes: Option<DB::RawValue<'_>>) -> Result<Self>

A specialized variant of from_sql for handling null values.

impl HasSqlType<Json> for Mysql

fn metadata(_: &mut ()) -> MysqlType

Fetch the metadata for the given type

impl HasSqlType<Json> for Pg

fn metadata(_: &mut Self::MetadataLookup) -> PgTypeMetadata

Fetch the metadata for the given type

impl QueryId for Json

const HAS_STATIC_QUERY_ID: bool = true

Can the SQL generated by Self be uniquely identified by its type?

type QueryId = Json

A type which uniquely represents Self in a SQL query.

fn query_id() -> Option<TypeId>

Returns the type id of Self::QueryId if Self::HAS_STATIC_QUERY_ID. Returns None otherwise.

impl SqlType for Json

type IsNull = NotNull

Is this type nullable?

impl ToSql<Json, Mysql> for Value

Available on crate features serde_json and mysql_backend only.

fn to_sql<'b>(&'b self, out: &mut Output<'b, '_, Mysql>) -> Result

See the trait documentation.

impl ToSql<Json, Pg> for Value

Available on crate features serde_json and postgres_backend only.

fn to_sql<'b>(&'b self, out: &mut Output<'b, '_, Pg>) -> Result

See the trait documentation.

impl Copy for Json

impl SingleValue for Json