Struct LocalPracticeStats

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pub struct LocalPracticeStats { /* private fields */ }

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An implementation of PracticeStats backed by SQLite.

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impl LocalPracticeStats

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pub fn new_from_disk(db_path: &str) -> Result<LocalPracticeStats>

A constructor taking the path to a database file.

Trait Implementations§

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impl PracticeStats for LocalPracticeStats

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fn get_scores( &self, exercise_id: Ustr, num_scores: usize, ) -> Result<Vec<ExerciseTrial>, PracticeStatsError>

Retrieves the last num_scores scores of a particular exercise. The scores are returned in descending order according to the timestamp.

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fn record_exercise_score( &mut self, exercise_id: Ustr, score: MasteryScore, timestamp: i64, ) -> Result<(), PracticeStatsError>

Records the score assigned to the exercise in a particular trial. Therefore, the score is a value of the MasteryScore enum instead of a float. Only units of type UnitType::Exercise should have scores recorded. However, the enforcement of this requirement is left to the caller.

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fn trim_scores(&mut self, num_scores: usize) -> Result<(), PracticeStatsError>

Deletes all the exercise trials except for the last num_scores with the aim of keeping the storage size under check.

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fn remove_scores_with_prefix( &mut self, prefix: &str, ) -> Result<(), PracticeStatsError>

Removes all the scores from the units that match the given prefix.

Auto Trait Implementations§

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impl !UnwindSafe for LocalPracticeStats

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impl<T> Any for T
where T: 'static + ?Sized,

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fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more

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impl<T> Borrow<T> for T
where T: ?Sized,

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fn borrow(&self) -> &T

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impl<T> BorrowMut<T> for T
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fn borrow_mut(&mut self) -> &mut T

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Converts Rc<Trait> (where Trait: Downcast) to Rc<Any>, which can then be further downcast into Rc<ConcreteType> where ConcreteType implements Trait.

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fn as_any(&self) -> &(dyn Any + 'static)

Converts &Trait (where Trait: Downcast) to &Any. This is needed since Rust cannot generate &Any’s vtable from &Trait’s.

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where T: Any + Send,

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Returns the argument unchanged.

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fn into(self) -> U

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

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fn into_either(self, into_left: bool) -> Either<Self, Self>

Converts self into a Left variant of Either<Self, Self> if into_left is true. Converts self into a Right variant of Either<Self, Self> otherwise. Read more

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fn into_either_with<F>(self, into_left: F) -> Either<Self, Self>
where F: FnOnce(&Self) -> bool,

Converts self into a Left variant of Either<Self, Self> if into_left(&self) returns true. Converts self into a Right variant of Either<Self, Self> otherwise. Read more

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