[JGamboa]

📑 Description

Part of goravel/goravel#1000 (reading results section). Follows #1575. Roadmap: goravel/goravel#1015

Adds Latest, Value and DoesntExist to orm.Query, with the same signatures as db.Query:

facades.Orm().Query().Model(&Post{}).Latest().First(&post)                        // ORDER BY created_at DESC
facades.Orm().Query().Model(&User{}).Where("id", 1).Value("email", &email)
missing, err := facades.Orm().Query().Model(&User{}).Where("email", email).DoesntExist()

• Latest(column ...string) is OrderByDesc, defaulting to created_at when no column (or an empty one) is given.
• DoesntExist() is !Exists(), so it respects global scopes and soft deletes.
• Value(column, dest):
  • It applies global scopes and conditions, then Select(column).Limit(1).Scan(dest).
  • A non-pointer dest returns DatabaseUnsupportedType.
  • With no rows it returns nil and leaves dest untouched, like the DB module.
  • It doesn't fire Retrieved, since it reads a raw column, like Pluck/Sum.
• Mocks are regenerated.

Found while testing, not changed here: OrderByDesc("id").First() (and so Latest("id").First()) fails on SQL Server, because GORM appends a second ORDER BY id and the column ends up duplicated. It happens on master too. I can open an issue for it.

✅ Checks

• Added test cases for my code
  • Unit tests in database/gorm.
  • Integration: TestLatest, TestValue, TestDoesntExist, plus DoesntExist/Value subtests in TestGlobalScopes. They pass on Postgres, MySQL, SQLite and SQL Server.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 73.27%. Comparing base (7ffe4a8) to head (6306648).

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #1577      +/-   ##
==========================================
+ Coverage   72.91%   73.27%   +0.36%     
==========================================
  Files         412      412              
  Lines       26893    26906      +13     
==========================================
+ Hits        19608    19716     +108     
+ Misses       7283     7188      -95     
  Partials        2        2              

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[JGamboa]

Review Ready