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feat(lesson25): DB queries + library_users model/repo + DB loader wiring - #810

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JoyBrown252:feat/lesson25/db-loader-sql
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feat(lesson25): DB queries + library_users model/repo + DB loader wiring#810
JoyBrown252 wants to merge 1 commit into
code-differently:mainfrom
JoyBrown252:feat/lesson25/db-loader-sql

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@JoyBrown252

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What I changed

  • Added SQL script files (counts by type, sum pages checked out, guests with checkouts)
  • Created library_users table + seed data
  • Implemented LibraryUserModel and LibraryUserRepository
  • Implemented LibraryDbDataLoader#loadData() and wired users into models.LibraryDataModel

How to test

  1. Seed users (already done):
    cd lesson_25/db/db_app/src/main/resources/sqlite
    sqlite3 library.db ".read joy_add_library_users.sql"
    sqlite3 library.db "SELECT COUNT(*) FROM library_users;" # expect 3

  2. Run the app:
    ./lesson_25/db/gradlew -p lesson_25/db :db_app:run --console=plain

    App starts; no SQL errors; CLI menu appears.

  3. (Optional) Execute queries:
    sqlite3 library.db ".read ../queries/joy_counts_by_type.sql"
    sqlite3 library.db ".read ../queries/joy_sum_pages_checked_out.sql"
    sqlite3 library.db ".read ../queries/joy_guests_with_checkouts.sql"

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