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>
33 lines
945 B
Markdown
33 lines
945 B
Markdown
# Import / Export Pattern Notes
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This file keeps examples. The normative rules live in `contract.md`.
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## Export Handler Sketch
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```go
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func ExportCSV(c *gin.Context) {
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c.Header("Content-Type", "text/csv; charset=utf-8")
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c.Header("Content-Disposition", `attachment; filename="export.csv"`)
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c.Writer.Write([]byte{0xEF, 0xBB, 0xBF})
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w := csv.NewWriter(c.Writer)
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w.Comma = ';'
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w.Write([]string{"ID", "Name", "Price"})
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err := svc.StreamRows(ctx, filters, func(row Row) error {
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return w.Write([]string{row.ID, row.Name, formatPrice(row.Price)})
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})
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w.Flush()
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if err != nil {
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slog.Error("csv export failed mid-stream", "err", err)
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}
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}
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```
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## Locale Notes
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- BOM avoids broken UTF-8 in Excel on Windows.
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- Semicolon avoids single-column imports in RU/EU locales.
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- Decimal comma keeps numbers numeric in Excel.
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- `DD.MM.YYYY` is preferred over ISO dates for user-facing spreadsheet exports.
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