Struct Workday 

pub struct Workday {
    pub id: i32,
    pub date: NaiveDate,
    pub start: NaiveDateTime,
    pub end: Option<NaiveDateTime>,
}

Represents a complete workday record with temporal boundaries.

A workday encapsulates a single day’s work session with start and end times, providing the fundamental unit for time tracking and productivity analysis. Each workday corresponds to one calendar date and contains the temporal boundaries of work activity for that day.

Time Representation

All timestamps use NaiveDateTime to represent local timezone times consistently across the application. This approach avoids timezone complexity while maintaining accuracy for user-centric time tracking.

Completion States

• Active Session: end is None, indicating ongoing work
• Completed Session: end is Some(timestamp), work session finished
• Historical Record: Both start and end times available for analysis

Fields

id: i32

Database-assigned unique identifier.

Used for internal database operations and referential integrity. Automatically assigned when the workday is created.

date: NaiveDate

Calendar date for this work session.

Each date can have only one workday record, enforced by database constraints. Represents the calendar day when work was performed, independent of the actual start/end times which may span midnight.

start: NaiveDateTime

Timestamp when work session began.

Records the exact moment work started for this date, using local timezone for consistency. This timestamp is always required and serves as the foundation for work duration calculations.

end: Option<NaiveDateTime>

Timestamp when work session ended, if completed.

None indicates an active/ongoing work session that hasn’t been completed yet. Some(timestamp) indicates a finished work session with the exact completion time for duration calculations.

Trait Implementations

impl Clone for Workday

fn clone(&self) -> Workday

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Workday

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

Formats the value using the given formatter.