add meta

src/main/scala/minisql/Meta.scala

@@ -1,3 +1,18 @@
 package minisql
 
-type QueryMeta
+import minisql.util.*
+import scala.deriving.*
+import scala.quoted.*
+
+opaque type UpdateMeta[E] <: List[String] = List[String]
+
+object UpdateMeta {
+
+  inline def noExclude[E]: UpdateMeta[E] = unsafe(Nil)
+
+  inline def apply[E](using m: Mirror.ProductOf[E])(
+    inline exclude: List[Tuple.Union[m.MirroredElemLabels] & String]
+  ): UpdateMeta[E] = unsafe(exclude)
+
+  inline def unsafe[E](inline ex: List[String]): UpdateMeta[E] = ex
+}

src/main/scala/minisql/Quoted.scala

@@ -21,6 +21,7 @@ import scala.deriving.*
 import scala.compiletime.*
 import scala.compiletime.ops.string.*
 import scala.collection.immutable.{Map => IMap}
+import scala.util.NotGiven
 
 opaque type Quoted <: Ast = Ast
 
@@ -165,7 +166,13 @@ object EntityQuery {
     }
 
     inline def insert(v: E): Insert[E] = {
-      ast.Insert(e, transformCaseClassToAssignments[E](v))
+      ast.Insert(e, transformCaseClassToAssignments[E](v, Nil))
+    }
+
+    inline def update(
+      v: E
+    )(using inline m: UpdateMeta[E] = UpdateMeta.noExclude[E]): Update[Long] = {
+      ast.Update(e, transformCaseClassToAssignments[E](v, m))
     }
 
     inline def update(inline ass: (E => (Any, Any))*): Update[Long] = {
@@ -193,35 +200,45 @@ private def parseFuncAssignImpl[E](x: Expr[Seq[E => (Any, Any)]])(using
 }
 
 private inline def transformCaseClassToAssignments[E](
-  v: E
+  v: E,
+  inline exclude: List[String]
 ): List[ast.Assignment] = ${
-  transformCaseClassToAssignmentsImpl[E]('v)
+  transformCaseClassToAssignmentsImpl[E]('v, 'exclude)
 }
 
 private def transformCaseClassToAssignmentsImpl[E: Type](
-  v: Expr[E]
+  v: Expr[E],
+  exclude: Expr[List[String]]
 )(using Quotes): Expr[List[ast.Assignment]] = {
   import quotes.reflect.*
 
+  val excludeFields = extractTerm(exclude.asTerm).asExpr match {
+    case '{ $xs: List[String] } =>
+      xs.value.getOrElse(
+        report.errorAndAbort(s"Cannot handle exclude ${xs.show}")
+      )
+  }
+
   val fields = TypeRepr.of[E].typeSymbol.caseFields
-  val assignments = fields.map { field =>
-    val fieldName = field.name
-    val fieldType = field.tree match {
-      case v: ValDef => v.tpt.tpe
-      case _ => report.errorAndAbort(s"Expected ValDef for field $fieldName")
-    }
-    fieldType.asType match {
-      case '[t] =>
-        '{
-          ast.Assignment(
-            ast.Ident("v"),
-            ast.Property(ast.Ident("v"), ${ Expr(fieldName) }),
-            quotedLift[t](${ Select(v.asTerm, field).asExprOf[t] })(using
-              summonInline[ParamEncoder[t]]
+  val assignments = fields.collect {
+    case field if !excludeFields.contains(field.name) =>
+      val fieldName = field.name
+      val fieldType = field.tree match {
+        case v: ValDef => v.tpt.tpe
+        case _ => report.errorAndAbort(s"Expected ValDef for field $fieldName")
+      }
+      fieldType.asType match {
+        case '[t] =>
+          '{
+            ast.Assignment(
+              ast.Ident("v"),
+              ast.Property(ast.Ident("v"), ${ Expr(fieldName) }),
+              quotedLift[t](${ Select(v.asTerm, field).asExprOf[t] })(using
+                summonInline[ParamEncoder[t]]
+              )
             )
-          )
-        }
-    }
+          }
+      }
   }
 
   Expr.ofList(assignments)

src/test/scala/minisql/context/sql/MirrorSqlContextSuite.scala

@@ -6,10 +6,12 @@ import minisql.idiom.*
 import minisql.NamingStrategy
 import minisql.MirrorContext
 import minisql.context.mirror.{*, given}
+import scala.quoted.* // Needed for inline/summonFrom
 
 class MirrorSqlContextSuite extends munit.FunSuite {
 
-  case class Foo(id: Long, name: String)
+  case class Foo(id: Long, name: String, age: Int)
+  val foo0: Foo = Foo(0L, "foo", 10)
 
   inline def Foos = query[Foo]("foo")
 
@@ -22,26 +24,28 @@ class MirrorSqlContextSuite extends munit.FunSuite {
         alias("id", "id1")
       ).filter(x => x.id > 0)
     )
-    assertEquals(o.sql, "SELECT x.id1, x.name FROM foo x WHERE x.id1 > 0")
+    assertEquals(
+      o.sql,
+      "SELECT x.id1, x.name, x.age FROM foo x WHERE x.id1 > 0"
+    )
   }
 
   test("Insert") {
-    val v: Foo = Foo(0L, "foo")
+    val v: Foo = Foo(0L, "foo", 1)
 
     val o = testContext.io(Foos.insert(v))
     assertEquals(
       o.sql,
-      "INSERT INTO foo (id,name) VALUES (?, ?)"
+      "INSERT INTO foo (id,name,age) VALUES (?, ?, ?)"
     )
   }
 
   test("InsertReturningGenerated") {
-    val v: Foo = Foo(0L, "foo")
 
-    val o = testContext.io(Foos.insert(v).returningGenerated(_.id))
+    val o = testContext.io(Foos.insert(foo0).returningGenerated(_.id))
     assertEquals(
       o.sql,
-      "INSERT INTO foo (name) VALUES (?) RETURNING id"
+      "INSERT INTO foo (name,age) VALUES (?, ?) RETURNING id"
     )
   }
 
@@ -64,7 +68,7 @@ class MirrorSqlContextSuite extends munit.FunSuite {
     assertEquals(o.sql, "SELECT CONCAT(f.name, ' ', f.id) FROM foo f")
   }
 
-  test("Update") {
+  test("Update with explicit assignments") {
     val name = "new name"
     val id   = 2L
     val o = testContext.io(
@@ -88,4 +92,15 @@ class MirrorSqlContextSuite extends munit.FunSuite {
       "UPDATE foo SET id = (id + ?) WHERE id = 1"
     )
   }
+
+  test("Update/excluding fields") {
+    inline given UpdateMeta[Foo] = UpdateMeta[Foo](List("id"))
+    val o = testContext.io(
+      Foos.filter(_.id == 1).update(foo0)
+    )
+    assertEquals(
+      o.sql,
+      "UPDATE foo SET name = ?, age = ? WHERE id = 1"
+    )
+  }
 }