Use UUID instead of INT for schema ID by default in addmodel

[Copilot]

The cmd/addmodel generator was using auto-incrementing integers for primary keys. This changes the default to UUID v4 for better distributed system compatibility.

Changes

Schema generation

• Add field.UUID("id", uuid.UUID{}).Default(uuid.New) as first field in generated schemas
• Import github.com/google/uuid in schema files

Handler generation

• Replace strconv.Atoi(chi.URLParam(r, "id")) with uuid.Parse(idStr) for ID parsing
• Add error handling for invalid UUID format
• Conditionally import strconv only when int/float fields present

Example generated schema:

func (Product) Fields() []ent.Field {
    return []ent.Field{
        field.UUID("id", uuid.UUID{}).
            Default(uuid.New),
        
        field.String("name").
            NotEmpty(),
        // ... other fields
    }
}

Example generated handler:

func (h *ProductHandler) Edit(w http.ResponseWriter, r *http.Request) {
    idStr := chi.URLParam(r, "id")
    id, err := uuid.Parse(idStr)
    if err != nil {
        h.Renderer.RenderError(w, r, http.StatusBadRequest, "Invalid ID")
        return
    }
    
    product, err := h.Client.Product.Get(r.Context(), id)
    // ...
}

Only affects newly generated models. Existing schemas remain unchanged.

Original prompt

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This section details on the original issue you should resolve

<issue_title>Use UUID instead of INT for schema id by default</issue_title>
<issue_description>Use UUID instead of INT for schema id by default for cmd/addmodel program</issue_description>

Comments on the Issue (you are @copilot in this section)

• Fixes Use UUID instead of INT for schema id by default #7

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[itsharrykim]

Manually edited and fixed all other issues after Copilot's first draft

• all handler, middleware, renderer files needed to be edited to accept UUID instead of INT for ID.