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Merge branch 'fix/calculation-accuracy' into main
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Combines the decimal migration (int cents → decimal.Decimal via
shopspring/decimal) with main's handler refactor (split space.go into
domain handlers, WithTx/Paginate helpers, recurring deposit removal).

- Repository layer: WithTx pattern + decimal column names/types
- Handler layer: decimal arithmetic (.Sub/.Add) instead of int operators
- Models: deprecated amount_cents fields kept for SELECT * compatibility
- INSERT statements: old columns set to literal 0 for NOT NULL constraints

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
This commit is contained in:
juancwu 2026-03-14 16:48:40 -04:00
commit 89c5d76e5e
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46 changed files with 661 additions and 539 deletions
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8
internal/handler/budget_handler.go
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@ -106,7 +106,7 @@ func (h *BudgetHandler) CreateBudget(w http.ResponseWriter, r *http.Request) {
ui.RenderError(w, r, "Invalid amount.", http.StatusUnprocessableEntity)
return
}
amountCents := int(amountDecimal.Mul(decimal.NewFromInt(100)).IntPart())
amount := amountDecimal
startDate, err := time.Parse("2006-01-02", startDateStr)
if err != nil {
@ -127,7 +127,7 @@ func (h *BudgetHandler) CreateBudget(w http.ResponseWriter, r *http.Request) {
_, err = h.budgetService.CreateBudget(service.CreateBudgetDTO{
SpaceID: spaceID,
TagIDs: tagIDs,
Amount: amountCents,
Amount: amount,
Period: model.BudgetPeriod(periodStr),
StartDate: startDate,
EndDate: endDate,
@ -186,7 +186,7 @@ func (h *BudgetHandler) UpdateBudget(w http.ResponseWriter, r *http.Request) {
ui.RenderError(w, r, "Invalid amount.", http.StatusUnprocessableEntity)
return
}
amountCents := int(amountDecimal.Mul(decimal.NewFromInt(100)).IntPart())
amount := amountDecimal
startDate, err := time.Parse("2006-01-02", startDateStr)
if err != nil {
@ -207,7 +207,7 @@ func (h *BudgetHandler) UpdateBudget(w http.ResponseWriter, r *http.Request) {
_, err = h.budgetService.UpdateBudget(service.UpdateBudgetDTO{
ID: budgetID,
TagIDs: tagIDs,
Amount: amountCents,
Amount: amount,
Period: model.BudgetPeriod(periodStr),
StartDate: startDate,
EndDate: endDate,