Struct M0003 

pub struct M0003;

Migration that drops the snapshot table and extends the event name column.

This migration makes two changes to optimize the schema:

Changes

1. Drops the snapshot table - The snapshot functionality has been removed from Evento, so this table is no longer needed.

2. Extends event.name column - Changes the name column from VARCHAR(20) to VARCHAR(50) to accommodate longer event type names.

Database-Specific Notes

• SQLite: The column alteration is a no-op since SQLite doesn’t support ALTER COLUMN. The column was already created with sufficient length.
• MySQL: Uses MODIFY COLUMN syntax.
• PostgreSQL: Uses standard ALTER COLUMN syntax.

Dependencies

This migration depends on M0002.

Trait Implementations

impl Migration<MySql> for M0003

fn app(&self) -> &str

Returns the application name associated with the migration. This can be the name of the folder or library where the migration is located.

fn name(&self) -> &str

Returns the migration name, typically the file name without the extension.

fn parents(&self) -> Vec<Box<dyn Migration<MySql>>>

Returns the list of parent migrations that must be applied before this migration can be applied.

fn operations(&self) -> Vec<Box<dyn Operation<MySql>>>

Returns the list of operations that make up the migration.

fn replaces(&self) -> Vec<Box<dyn Migration<DB>>>

Returns the list of migrations that this migration replaces.

fn run_before(&self) -> Vec<Box<dyn Migration<DB>>>

Returns the list of migrations that should be run before this migration when applying. but when reverting this migration these migrations should be reverted after this migration is reverted.

fn is_atomic(&self) -> bool

Indicates whether the migration is atomic. By default, this function returns true, meaning the migration is atomic.

fn is_virtual(&self) -> bool

Indicates whether the migration is virtual. By default, this function returns false, meaning the migration is not virtual.

impl Migration<Postgres> for M0003

fn app(&self) -> &str

Returns the application name associated with the migration. This can be the name of the folder or library where the migration is located.

fn name(&self) -> &str

Returns the migration name, typically the file name without the extension.

fn parents(&self) -> Vec<Box<dyn Migration<Postgres>>>

Returns the list of parent migrations that must be applied before this migration can be applied.

fn operations(&self) -> Vec<Box<dyn Operation<Postgres>>>

Returns the list of operations that make up the migration.

fn replaces(&self) -> Vec<Box<dyn Migration<DB>>>

Returns the list of migrations that this migration replaces.

fn run_before(&self) -> Vec<Box<dyn Migration<DB>>>

Returns the list of migrations that should be run before this migration when applying. but when reverting this migration these migrations should be reverted after this migration is reverted.

fn is_atomic(&self) -> bool

Indicates whether the migration is atomic. By default, this function returns true, meaning the migration is atomic.

fn is_virtual(&self) -> bool

Indicates whether the migration is virtual. By default, this function returns false, meaning the migration is not virtual.

impl Migration<Sqlite> for M0003

fn app(&self) -> &str

Returns the application name associated with the migration. This can be the name of the folder or library where the migration is located.

fn name(&self) -> &str

Returns the migration name, typically the file name without the extension.

fn parents(&self) -> Vec<Box<dyn Migration<Sqlite>>>

Returns the list of parent migrations that must be applied before this migration can be applied.

fn operations(&self) -> Vec<Box<dyn Operation<Sqlite>>>

Returns the list of operations that make up the migration.

fn replaces(&self) -> Vec<Box<dyn Migration<DB>>>

Returns the list of migrations that this migration replaces.

fn run_before(&self) -> Vec<Box<dyn Migration<DB>>>

Returns the list of migrations that should be run before this migration when applying. but when reverting this migration these migrations should be reverted after this migration is reverted.

fn is_atomic(&self) -> bool

Indicates whether the migration is atomic. By default, this function returns true, meaning the migration is atomic.

fn is_virtual(&self) -> bool

Indicates whether the migration is virtual. By default, this function returns false, meaning the migration is not virtual.