What causes "get config failed: %w" in apache/answer?

Check the wrapped DB error for the underlying cause

get config failed: %w

Error message

get config failed: %w

What it means

Migration addLoginLimitations reads the site_info row of type 'login'. If the xorm Get query errors, it returns 'get config failed: %w'. This is a data-migration failure reading existing login page configuration, not a missing-config case (that is the exist==false path).

Source

Thrown at internal/migrations/v10.go:40

import (
	"context"
	"encoding/json"
	"fmt"

	"github.com/apache/answer/internal/base/constant"
	"github.com/apache/answer/internal/entity"
	"github.com/apache/answer/internal/schema"
	"github.com/tidwall/gjson"
	"xorm.io/xorm"
)

func addLoginLimitations(ctx context.Context, x *xorm.Engine) error {
	loginSiteInfo := &entity.SiteInfo{
		Type: constant.SiteTypeLogin,
	}
	exist, err := x.Context(ctx).Get(loginSiteInfo)
	if err != nil {
		return fmt.Errorf("get config failed: %w", err)
	}
	if exist {
		content := &schema.SiteLoginReq{}
		_ = json.Unmarshal([]byte(loginSiteInfo.Content), content)
		content.AllowEmailRegistrations = true
		content.AllowEmailDomains = make([]string, 0)
		data, _ := json.Marshal(content)
		loginSiteInfo.Content = string(data)
		_, err = x.Context(ctx).ID(loginSiteInfo.ID).Cols("content").Update(loginSiteInfo)
		if err != nil {
			return fmt.Errorf("update site info failed: %w", err)
		}
	}

	interfaceSiteInfo := &entity.SiteInfo{
		Type: constant.SiteTypeInterface,
	}
	exist, err = x.Context(ctx).Get(interfaceSiteInfo)

View on GitHub (pinned to 3b9f137061)

Solutions

Check the wrapped DB error for the underlying cause
Ensure all earlier migrations (v1–v9) completed so site_info exists
Verify SELECT privileges on site_info
Re-run Migrate after restoring DB connectivity

Defensive patterns

Strategy: try-catch

Validate before calling

// ensure site_info exists and is readable before v10
if exist, err := engine.IsTableExist(&entity.SiteInfo{}); err != nil || !exist {
    return fmt.Errorf("site_info missing; run earlier migrations first")
}

Try / catch

if err := migrations.Migrate(db); err != nil {
    var wrapped error
    if errors.As(err, &wrapped) && strings.Contains(err.Error(), "get config failed") {
        log.Errorf("v10 could not read login config: %v", err)
    }
    return err
}

Prevention

Apply migrations in order; never skip versions
Confirm site_info table exists before v10
Use %w wrapping and errors.As to surface root causes
Backup site_info before running data migrations

When it happens

Trigger: x.Context(ctx).Get(loginSiteInfo) returns a DB error during v10 migration: connection failure, missing site_info table (migration ordering), permission denied, or context cancelled.

Common situations: Running v10 migration against a DB where earlier migrations were skipped or partially applied; DB credentials/permissions changed; network interruption mid-migration.

Related errors

AI-assisted analysis of apache/answer@3b9f137061 (2026-09-05). Data as JSON: /api/errors/44527ef8e9d8d49b. Report an issue: GitHub.