Struct webext_storage::migration::MigrationInfo

pub struct MigrationInfo {
    pub entries: usize,
    pub entries_successful: usize,
    pub extensions: usize,
    pub extensions_successful: usize,
    pub open_failure: bool,
}

Fields

entries: usize

The number of entries (rows in the original table) we attempted to migrate. Zero if there was some error in computing this number.

Note that for the original table, a single row stores a single preference for one extension. That is, if you view the set of preferences for a given extension as a HashMap (as we do), it would be a single entry/key-value-pair in the map.

entries_successful: usize

The number of records we successfully migrated (equal to entries for entirely successful migrations).

extensions: usize

The number of extensions (distinct extension ids) in the original table.

extensions_successful: usize

The number of extensions we successfully migrated

open_failure: bool

True iff we failed to open the source DB at all.

Implementations

impl MigrationInfo

fn open_failure() -> Self

Returns a MigrationInfo indicating that we failed to read any rows due to some error case (e.g. the database open failed, or some other very early read error).

const META_KEY: &'static str

pub(crate) fn store(&self, conn: &Connection) -> Result<()>

Store self in the provided database under Self::META_KEY.

pub(crate) fn take(tx: &Transaction<'_>) -> Result<Option<Self>>

Get the MigrationInfo stored under Self::META_KEY (if any) out of the DB, and delete it.

Trait Implementations

impl Clone for MigrationInfo

fn clone(&self) -> MigrationInfo

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for MigrationInfo

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

Formats the value using the given formatter.

impl Default for MigrationInfo

fn default() -> MigrationInfo

Returns the "default value" for a type.

impl<'de> Deserialize<'de> for MigrationInfo

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error> where
    __D: Deserializer<'de>, 

Deserialize this value from the given Serde deserializer.

impl PartialEq<MigrationInfo> for MigrationInfo

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

This method tests for self and other values to be equal, and is used by ==.

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

This method tests for !=.

impl Serialize for MigrationInfo

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 MigrationInfo