//
// Note that returning an error here will cause the Metrics handler to return a
// 500 Internal Server Error.
type MetricsLoaderFn func(context.Context, MetricValues, *metricsCache) error

// JoinLoaders - joins multiple loaders into a single loader. The returned
// loader will call each of the given loaders in order. If any of the loaders
// return an error, the returned loader will return that error.

		result := drain(input)
		if result != test.output {
			t.Errorf("%s: got %q expected %q", test.name, result, test.output)
		}
	}
}

// lines joins the arguments together as complete lines.
func lines(a ...string) string {
	return strings.Join(a, "\n") + "\n"
}

// drain returns a single string representing the processed input tokens.

	var result User

	newDB := DB.Session(&gorm.Session{NewDB: true, DryRun: true}).Table("users")

	newDB.Clauses(
		clause.From{
			Tables: []clause.Table{{Name: "users"}},
			Joins: []clause.Join{
				{
					Table: clause.Table{Name: "companies", Raw: false},
					ON: clause.Where{
						Exprs: []clause.Expression{
							clause.Eq{
								Column: clause.Column{
									Table: "users",

						}
					} else if names := utils.SplitNestedRelationName(column); len(names) > 1 { // has nested relation
						aliasName := utils.JoinNestedRelationNames(names[0 : len(names)-1])
						for _, join := range db.Statement.Joins {
							if join.Alias == aliasName {
								names = append(strings.Split(join.Name, "."), names[len(names)-1])
								break
							}
						}

						if rel, ok := sch.Relationships.Relations[names[0]]; ok {

		t.Fatalf("Build count with select, but got %v", result.Statement.SQL.String())
	}

	var count4 int64
	if err := DB.Table("users").Joins("LEFT JOIN companies on companies.name = users.name").Where("users.name = ?", user1.Name).Count(&count4).Error; err != nil || count4 != 1 {
		t.Errorf("count with join, got error: %v, count %v", err, count4)
	}

				tx.Clauses(clause.Expr{SQL: strings.Replace(joinStmt.SQL.String(), "WHERE ", "", 1), Vars: joinStmt.Vars})
			}
		}

		tx = tx.Session(&Session{QueryFields: true}).Clauses(clause.From{Joins: []clause.Join{{
			Table: clause.Table{Name: association.Relationship.JoinTable.Table},
			ON:    clause.Where{Exprs: queryConds},
		}}})
	} else {
		tx.Clauses(clause.Where{Exprs: queryConds})
	}

        if (StringUtil.isBlank(input)) {
            return input;
        }
        return ComponentUtil.getDocumentHelper().encodeSimilarDocHash(input);
    }

    /**
     * Joins array or list elements into a single space-separated string.
     *
     * @param input the input object (String[], List, or String)
     * @return joined string with elements separated by spaces, or empty string if invalid input

func generateCredentialStr(accessKey, date, region, service, requestVersion string) string {
	return "Credential=" + joinWithSlash(accessKey, date, region, service, requestVersion)
}

// joins the argument strings with a '/' and returns it.
func joinWithSlash(accessKey, date, region, service, requestVersion string) string {
	return strings.Join([]string{
		accessKey,
		date,
		region,
		service,

		t.Errorf("failed to create:%v", err)
	}

	err = DB.Create(&q2).Error
	if err != nil {
		t.Errorf("failed to create:%v", err)
	}

	var qs []QueryResetNullValue
	err = DB.Joins("Item1").Joins("Item2").Find(&qs).Error
	if err != nil {
		t.Errorf("failed to find:%v", err)
	}

	if len(qs) != 2 {
		t.Fatalf("find count not equal:%d", len(qs))
	}

	AssertEqual(t, q1, qs[0])

	_, err = findColumnType(&RelationModel2{}, "id")
	if err == nil {
		t.Errorf("RelationModel2 should not be migrated")
	}
}

func TestMigrateView(t *testing.T) {
	DB.Save(GetUser("joins-args-db", Config{Pets: 2}))

	if err := DB.Migrator().CreateView("invalid_users_pets",
		gorm.ViewOption{Query: nil}); err != gorm.ErrSubQueryRequired {
		t.Fatalf("no view should be created, got %v", err)
	}