try fix again again again again again.

database/postgres/migrations/20210726221410_make_post_position_index_deferrable.sql

@@ -0,0 +1,13 @@
+-- +goose Up
+-- +goose StatementBegin
+ALTER TABLE log_post
+    DROP CONSTRAINT log_post_log_short_id_position_key,
+    ADD  CONSTRAINT log_post_log_short_id_position_key UNIQUE(log_short_id, position) DEFERRABLE;
+-- +goose StatementEnd
+
+-- +goose Down
+-- +goose StatementBegin
+ALTER TABLE log_post
+    DROP CONSTRAINT log_post_log_short_id_position_key,
+    ADD  CONSTRAINT log_post_log_short_id_position_key UNIQUE(log_short_id, position);
+-- +goose StatementEnd

database/postgres/posts.go

@@ -4,6 +4,7 @@ import (
 	"context"
 	"database/sql"
 	"errors"
+	"fmt"
 	"git.aiterp.net/rpdata/api/database/postgres/psqlcore"
 	"git.aiterp.net/rpdata/api/internal/generate"
 	"git.aiterp.net/rpdata/api/models"
@@ -253,9 +254,9 @@ func (r *postRepository) Delete(ctx context.Context, post models.Post) error {
 		return err
 	}
 
-	err = q.DeletePost(ctx, post.ID)
+	err = q.MovePost(ctx, psqlcore.MovePostParams{ID: post.ID, Position: -1})
 	if err != nil {
-		return err
+		return fmt.Errorf("pre-delete move failed: %s", err)
 	}
 
 	err = q.ShiftPostsAfter(ctx, psqlcore.ShiftPostsAfterParams{
@@ -264,12 +265,17 @@ func (r *postRepository) Delete(ctx context.Context, post models.Post) error {
 		FromPosition: int32(post.Position + 1),
 	})
 	if err != nil {
-		return err
+		return fmt.Errorf("shift failed: %s", err)
+	}
+
+	err = q.DeletePost(ctx, post.ID)
+	if err != nil {
+		return fmt.Errorf("delete failed: %s", err)
 	}
 
 	err = tx.Commit()
 	if err != nil {
-		return err
+		return fmt.Errorf("tx commit failed: %s", err)
 	}
 
 	_ = psqlcore.New(r.db).GenerateLogTSVector(ctx, post.LogID)

services/auth.go

@@ -56,7 +56,7 @@ func (s *AuthService) FindKey(ctx context.Context, id string) (*models.Key, erro
 	return s.keys.Find(ctx, id)
 }
 
-// FindKey finds a key by id.
+// FindUser finds a user by id.
 func (s *AuthService) FindUser(ctx context.Context, id string) (*models.User, error) {
 	return s.users.Find(ctx, id)
 }
@@ -154,6 +154,13 @@ func (s *AuthService) TokenFromContext(ctx context.Context) *models.Token {
 	return token
 }
 
+// SpinOffContext adds the auth token to a background context.
+func (s *AuthService) SpinOffContext(ctx context.Context) context.Context {
+	token := s.TokenFromContext(ctx)
+
+	return context.WithValue(context.Background(), contextKey, token)
+}
+
 // RequestWithToken either returns the request, or the request with a new context that
 // has the token.
 func (s *AuthService) RequestWithToken(r *http.Request) *http.Request {

services/logs.go

@@ -484,15 +484,16 @@ func (s *LogService) EditPost(ctx context.Context, id string, update models.Post
 		return nil, err
 	}
 
+	spinOffCtx := s.authService.SpinOffContext(ctx)
 	go func() {
-		l, err := s.logs.Find(context.Background(), post.LogID)
+		timeout, cancel := context.WithTimeout(spinOffCtx, time.Minute*10)
+		defer cancel()
+
+		l, err := s.logs.Find(timeout, post.LogID)
 		if err != nil {
 			return
 		}
 
-		timeout, cancel := context.WithTimeout(context.Background(), time.Minute*10)
-		defer cancel()
-
 		s.changeService.Submit(timeout, models.ChangeModelPost, "edit", true, changekeys.Many(l, post), post)
 
 		_, err = s.refreshLogCharacters(timeout, *l, nil, false)