Michael Chus
421d004faf
Each rule now has one owning contract; others point to it: validation and multi-step rules live in forms-validation (modal-workflows references them), pagination metadata lives in go-api (table-management references it), the async task flow lives in go-background-tasks (go-api references it), backup git-safety checks live in backup-management (go-database references it). Remove the leftover Vapor/Aqua baseline mention and stale kit/patterns paths, compress the batch-file-upload ADR narrative, and drop content-free pattern READMEs. Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Import / Export Pattern Notes
This file keeps examples. The normative rules live in contract.md.
Export Handler Sketch
func ExportCSV(c *gin.Context) {
c.Header("Content-Type", "text/csv; charset=utf-8")
c.Header("Content-Disposition", `attachment; filename="export.csv"`)
c.Writer.Write([]byte{0xEF, 0xBB, 0xBF})
w := csv.NewWriter(c.Writer)
w.Comma = ';'
w.Write([]string{"ID", "Name", "Price"})
err := svc.StreamRows(ctx, filters, func(row Row) error {
return w.Write([]string{row.ID, row.Name, formatPrice(row.Price)})
})
w.Flush()
if err != nil {
slog.Error("csv export failed mid-stream", "err", err)
}
}
Locale Notes
- BOM avoids broken UTF-8 in Excel on Windows.
- Semicolon avoids single-column imports in RU/EU locales.
- Decimal comma keeps numbers numeric in Excel.
DD.MM.YYYYis preferred over ISO dates for user-facing spreadsheet exports.