An order model grows

A class diff. The domain model gains a Discount class and its relation, and a cardinality and two members change.

                                            ┌────────────────────┐
                                            │      Customer      │
                                            ├────────────────────┤
                                            │   - name: string   │
                                            │   - email: string  │
                                            └────────────────────┘
                                            places ◇ 1    ◆ 1
                                                   │      │
                                         ┌─────────┘      └─────────┐ ships to
                                         │ *                        │ 0..*
                              ┌────────────────────┐     ┌────────────────────┐
                              │       Order        │     │      Address       │
                              ├────────────────────┤     ├────────────────────┤
                              │   - id: string     │     │   - street: string │
                              │   - placedAt: Date │     │   - city: string   │
                              ├────────────────────┤     └────────────────────┘
                              │   + total(): Money │
                              └────────────────────┘
                          contains ◆ 1   ◆ 1  ◇ 1
                                   │     │    │
             ┌─────────────────────┘     │    └───────────────────────┐ applies
             │ 1..*           settled by │ 1                          │ 0..*
  ┌────────────────────┐      ┌────────────────────┐     ┌────────────────────────┐
  │     ~ LineItem     │      │     ~ Payment      │     │       + Discount       │
  ├────────────────────┤      ├────────────────────┤     ├────────────────────────┤
  │   - quantity: int  │      │   - method: string │     │   - code: string       │
  │ ~ + price: Money   │      │ - - amount: Money  │     │   - percentOff: number │
  └────────────────────┘      └────────────────────┘     └────────────────────────┘
             │ *
             │ references
             │ 1
   ┌──────────────────┐
   │     Product      │
   ├──────────────────┤
   │   - sku: string  │
   │   - name: string │
   └──────────────────┘

class-domain.json → class-domain-v2.json
added: class Discount
added: relation Order -> Discount
changed: relation Customer -> Address: to_card "1..*" → "0..*"
changed: class LineItem, changed attribute + price: Money
changed: class Payment, removed attribute - amount: Money

The version before the change: Order, LineItem, Product, Customer, Address and Payment. — Before

The version after the change: Order, LineItem, Product, Customer, Address, Payment and Discount. — After

Spec

{
  "type": "class",
  "theme": "default",
  "legend": true,
  "classes": [
    {
      "id": "order",
      "label": "Order",
      "attributes": [
        {"visibility": "-", "text": "id: string"},
        {"visibility": "-", "text": "placedAt: Date"}
      ],
      "methods": [{"visibility": "+", "text": "total(): Money"}]
    },
    {
      "id": "item",
      "label": "LineItem",
      "attributes": [
        {"visibility": "-", "text": "quantity: int"},
        {"visibility": "-", "text": "price: Money"}
      ]
    },
    {
      "id": "product",
      "label": "Product",
      "attributes": [
        {"visibility": "-", "text": "sku: string"},
        {"visibility": "-", "text": "name: string"}
      ]
    },
    {
      "id": "customer",
      "label": "Customer",
      "attributes": [
        {"visibility": "-", "text": "name: string"},
        {"visibility": "-", "text": "email: string"}
      ]
    },
    {
      "id": "address",
      "label": "Address",
      "attributes": [
        {"visibility": "-", "text": "street: string"},
        {"visibility": "-", "text": "city: string"}
      ]
    },
    {
      "id": "payment",
      "label": "Payment",
      "attributes": [
        {"visibility": "-", "text": "method: string"},
        {"visibility": "-", "text": "amount: Money"}
      ]
    }
  ],
  "relations": [
    {
      "id": "contains",
      "from": "order",
      "to": "item",
      "kind": "composition",
      "from_card": "1",
      "to_card": "1..*",
      "label": "contains"
    },
    {
      "id": "references",
      "from": "item",
      "to": "product",
      "kind": "association",
      "from_card": "*",
      "to_card": "1",
      "label": "references"
    },
    {
      "id": "places",
      "from": "customer",
      "to": "order",
      "kind": "aggregation",
      "from_card": "1",
      "to_card": "*",
      "label": "places"
    },
    {
      "id": "ships-to",
      "from": "customer",
      "to": "address",
      "kind": "composition",
      "from_card": "1",
      "to_card": "1..*",
      "label": "ships to"
    },
    {
      "id": "settled-by",
      "from": "order",
      "to": "payment",
      "kind": "composition",
      "from_card": "1",
      "to_card": "1",
      "label": "settled by"
    }
  ]
}

{
  "type": "class",
  "theme": "default",
  "legend": true,
  "classes": [
    {
      "id": "order",
      "label": "Order",
      "attributes": [
        {"visibility": "-", "text": "id: string"},
        {"visibility": "-", "text": "placedAt: Date"}
      ],
      "methods": [{"visibility": "+", "text": "total(): Money"}]
    },
    {
      "id": "item",
      "label": "LineItem",
      "attributes": [
        {"visibility": "-", "text": "quantity: int"},
        {"visibility": "+", "text": "price: Money"}
      ]
    },
    {
      "id": "product",
      "label": "Product",
      "attributes": [
        {"visibility": "-", "text": "sku: string"},
        {"visibility": "-", "text": "name: string"}
      ]
    },
    {
      "id": "customer",
      "label": "Customer",
      "attributes": [
        {"visibility": "-", "text": "name: string"},
        {"visibility": "-", "text": "email: string"}
      ]
    },
    {
      "id": "address",
      "label": "Address",
      "attributes": [
        {"visibility": "-", "text": "street: string"},
        {"visibility": "-", "text": "city: string"}
      ]
    },
    {
      "id": "payment",
      "label": "Payment",
      "attributes": [{"visibility": "-", "text": "method: string"}]
    },
    {
      "id": "discount",
      "label": "Discount",
      "attributes": [
        {"visibility": "-", "text": "code: string"},
        {"visibility": "-", "text": "percentOff: number"}
      ]
    }
  ],
  "relations": [
    {
      "id": "contains",
      "from": "order",
      "to": "item",
      "kind": "composition",
      "from_card": "1",
      "to_card": "1..*",
      "label": "contains"
    },
    {
      "id": "references",
      "from": "item",
      "to": "product",
      "kind": "association",
      "from_card": "*",
      "to_card": "1",
      "label": "references"
    },
    {
      "id": "places",
      "from": "customer",
      "to": "order",
      "kind": "aggregation",
      "from_card": "1",
      "to_card": "*",
      "label": "places"
    },
    {
      "id": "ships-to",
      "from": "customer",
      "to": "address",
      "kind": "composition",
      "from_card": "1",
      "to_card": "0..*",
      "label": "ships to"
    },
    {
      "id": "settled-by",
      "from": "order",
      "to": "payment",
      "kind": "composition",
      "from_card": "1",
      "to_card": "1",
      "label": "settled by"
    },
    {
      "id": "applies",
      "from": "order",
      "to": "discount",
      "kind": "aggregation",
      "from_card": "1",
      "to_card": "0..*",
      "label": "applies"
    }
  ]
}

Draw it yourself

diago diff domain-change.v1.json domain-change.v2.json > domain-change.diff.svg

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