Changed: DB Params

templ/generator/test-attribute-errors/expected.html

@@ -0,0 +1,5 @@
+<ul>
+    <li data-attr="raw"></li>
+    <li data-attr="OK"></li>
+    <li data-attr="OK2"></li>
+</ul>

templ/generator/test-attribute-errors/render_test.go

@@ -0,0 +1,57 @@
+package testattrerrs
+
+import (
+	"bytes"
+	"context"
+	_ "embed"
+	"errors"
+	"testing"
+
+	"github.com/a-h/templ"
+	"github.com/a-h/templ/generator/htmldiff"
+)
+
+//go:embed expected.html
+var expected string
+
+func Test(t *testing.T) {
+	t.Run("can render without error", func(t *testing.T) {
+		component := TestComponent(nil)
+
+		_, err := htmldiff.Diff(component, expected)
+		if err != nil {
+			t.Fatalf("unexpected error: %v", err)
+		}
+	})
+	t.Run("attribute expressions can return errors", func(t *testing.T) {
+		errSomethingBad := errors.New("bad error")
+
+		err := TestComponent(errSomethingBad).Render(context.Background(), &bytes.Buffer{})
+		if err == nil {
+			t.Fatalf("expected error, but got nil")
+		}
+
+		t.Run("the errors are templ errors", func(t *testing.T) {
+			var templateErr templ.Error
+			if !errors.As(err, &templateErr) {
+				t.Fatalf("expected error to be templ.Error, but got %T", err)
+			}
+			if templateErr.FileName != `generator/test-attribute-errors/template.templ` {
+				t.Errorf("expected error in `generator/test-attribute-errors/template.templ`, but got %v", templateErr.FileName)
+			}
+			if templateErr.Line != 18 {
+				t.Errorf("expected error on line 18, but got %v", templateErr.Line)
+			}
+			if templateErr.Col != 36 {
+				t.Errorf("expected error on column 26, but got %v", templateErr.Col)
+			}
+		})
+
+		t.Run("the underlying error can be unwrapped", func(t *testing.T) {
+			if !errors.Is(err, errSomethingBad) {
+				t.Errorf("expected error: %v, but got %v", errSomethingBad, err)
+			}
+		})
+
+	})
+}

templ/generator/test-attribute-errors/template.templ

@@ -0,0 +1,20 @@
+package testattrerrs
+
+func funcWithNoError() (s string) {
+	return "OK"
+}
+
+func funcWithError(in error) (s string, err error) {
+	if in != nil {
+		return "", in
+	}
+	return "OK2", nil
+}
+
+templ TestComponent(err error) {
+	<ul>
+		<li data-attr={ "raw" }></li>
+		<li data-attr={ funcWithNoError() }></li>
+		<li data-attr={ funcWithError(err) }></li>
+	</ul>
+}

templ/generator/test-attribute-errors/template_templ.go

@@ -0,0 +1,90 @@
+// Code generated by templ - DO NOT EDIT.
+
+// templ: version: v0.3.833
+package testattrerrs
+
+//lint:file-ignore SA4006 This context is only used if a nested component is present.
+
+import "github.com/a-h/templ"
+import templruntime "github.com/a-h/templ/runtime"
+
+func funcWithNoError() (s string) {
+	return "OK"
+}
+
+func funcWithError(in error) (s string, err error) {
+	if in != nil {
+		return "", in
+	}
+	return "OK2", nil
+}
+
+func TestComponent(err error) templ.Component {
+	return templruntime.GeneratedTemplate(func(templ_7745c5c3_Input templruntime.GeneratedComponentInput) (templ_7745c5c3_Err error) {
+		templ_7745c5c3_W, ctx := templ_7745c5c3_Input.Writer, templ_7745c5c3_Input.Context
+		if templ_7745c5c3_CtxErr := ctx.Err(); templ_7745c5c3_CtxErr != nil {
+			return templ_7745c5c3_CtxErr
+		}
+		templ_7745c5c3_Buffer, templ_7745c5c3_IsBuffer := templruntime.GetBuffer(templ_7745c5c3_W)
+		if !templ_7745c5c3_IsBuffer {
+			defer func() {
+				templ_7745c5c3_BufErr := templruntime.ReleaseBuffer(templ_7745c5c3_Buffer)
+				if templ_7745c5c3_Err == nil {
+					templ_7745c5c3_Err = templ_7745c5c3_BufErr
+				}
+			}()
+		}
+		ctx = templ.InitializeContext(ctx)
+		templ_7745c5c3_Var1 := templ.GetChildren(ctx)
+		if templ_7745c5c3_Var1 == nil {
+			templ_7745c5c3_Var1 = templ.NopComponent
+		}
+		ctx = templ.ClearChildren(ctx)
+		templ_7745c5c3_Err = templruntime.WriteString(templ_7745c5c3_Buffer, 1, "<ul><li data-attr=\"")
+		if templ_7745c5c3_Err != nil {
+			return templ_7745c5c3_Err
+		}
+		var templ_7745c5c3_Var2 string
+		templ_7745c5c3_Var2, templ_7745c5c3_Err = templ.JoinStringErrs("raw")
+		if templ_7745c5c3_Err != nil {
+			return templ.Error{Err: templ_7745c5c3_Err, FileName: `templ/generator/test-attribute-errors/template.templ`, Line: 16, Col: 23}
+		}
+		_, templ_7745c5c3_Err = templ_7745c5c3_Buffer.WriteString(templ.EscapeString(templ_7745c5c3_Var2))
+		if templ_7745c5c3_Err != nil {
+			return templ_7745c5c3_Err
+		}
+		templ_7745c5c3_Err = templruntime.WriteString(templ_7745c5c3_Buffer, 2, "\"></li><li data-attr=\"")
+		if templ_7745c5c3_Err != nil {
+			return templ_7745c5c3_Err
+		}
+		var templ_7745c5c3_Var3 string
+		templ_7745c5c3_Var3, templ_7745c5c3_Err = templ.JoinStringErrs(funcWithNoError())
+		if templ_7745c5c3_Err != nil {
+			return templ.Error{Err: templ_7745c5c3_Err, FileName: `templ/generator/test-attribute-errors/template.templ`, Line: 17, Col: 35}
+		}
+		_, templ_7745c5c3_Err = templ_7745c5c3_Buffer.WriteString(templ.EscapeString(templ_7745c5c3_Var3))
+		if templ_7745c5c3_Err != nil {
+			return templ_7745c5c3_Err
+		}
+		templ_7745c5c3_Err = templruntime.WriteString(templ_7745c5c3_Buffer, 3, "\"></li><li data-attr=\"")
+		if templ_7745c5c3_Err != nil {
+			return templ_7745c5c3_Err
+		}
+		var templ_7745c5c3_Var4 string
+		templ_7745c5c3_Var4, templ_7745c5c3_Err = templ.JoinStringErrs(funcWithError(err))
+		if templ_7745c5c3_Err != nil {
+			return templ.Error{Err: templ_7745c5c3_Err, FileName: `templ/generator/test-attribute-errors/template.templ`, Line: 18, Col: 36}
+		}
+		_, templ_7745c5c3_Err = templ_7745c5c3_Buffer.WriteString(templ.EscapeString(templ_7745c5c3_Var4))
+		if templ_7745c5c3_Err != nil {
+			return templ_7745c5c3_Err
+		}
+		templ_7745c5c3_Err = templruntime.WriteString(templ_7745c5c3_Buffer, 4, "\"></li></ul>")
+		if templ_7745c5c3_Err != nil {
+			return templ_7745c5c3_Err
+		}
+		return nil
+	})
+}
+
+var _ = templruntime.GeneratedTemplate