pub struct JsonCol<T> { /* private fields */ }Expand description
A serde_json::Value-typed column.
Implementations§
Source§impl<T> JsonCol<T>
impl<T> JsonCol<T>
pub const fn new(name: &'static str) -> Self
Sourcepub fn asc(&self) -> OrderExpr<T>
pub fn asc(&self) -> OrderExpr<T>
SQL ORDER BY ... ASC. Ordering on JSON values is well-defined
per-backend (Postgres has a total order on jsonb; SQLite orders
the underlying TEXT). Use sparingly — JSON ordering is rarely
what the user means.
Sourcepub fn path_text(&self, keys: &[&str]) -> JsonPathText<T>
pub fn path_text(&self, keys: &[&str]) -> JsonPathText<T>
Extract a JSON path as text. Postgres-only.
post::METADATA.path_text(&["author", "name"]).eq("alice")Renders as "metadata" -> 'author' ->> 'name' = 'alice' when
the QuerySet is bound to a PgPool. The path must have at
least one segment; an empty path panics at construction.
See JsonPathText for the chainable surface.
Sourcepub fn has_key(&self, key: &str) -> Predicate<T>
pub fn has_key(&self, key: &str) -> Predicate<T>
Postgres "col" ? key — true when the JSON object has the
given top-level key. Returns Predicate<T> directly (no
chainable form yet — has_key is a complete boolean op).
The key is single-quoted into the SQL fragment; standard SQL
apostrophe escaping is applied.
Auto Trait Implementations§
impl<T> Freeze for JsonCol<T>
impl<T> RefUnwindSafe for JsonCol<T>where
T: RefUnwindSafe,
impl<T> Send for JsonCol<T>where
T: Send,
impl<T> Sync for JsonCol<T>where
T: Sync,
impl<T> Unpin for JsonCol<T>where
T: Unpin,
impl<T> UnsafeUnpin for JsonCol<T>
impl<T> UnwindSafe for JsonCol<T>where
T: UnwindSafe,
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