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Copy pathorders.erd.json
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337 lines (337 loc) · 7.15 KB
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{
"schema_version": 1,
"diagram_type": "erd",
"meta": {
"title": "Order management schema",
"locale": "en",
"output": "examples/erd-orders-rendered.html",
"quality_profile": "showcase",
"views": [
{
"id": "identity",
"label": "Reference rows",
"focus": [
"customer",
"product"
],
"note": "The rows everything else points at, with their unique keys."
},
{
"id": "checkout",
"label": "Checkout core",
"focus": [
"order",
"order_item",
"customer"
],
"note": "order is the hub: order_item and payment both point back at it."
},
{
"id": "followups",
"label": "Payment and stock",
"focus": [
"payment",
"order",
"inventory",
"product"
],
"note": "One optional dashed link and one mandatory stock link."
}
]
},
"layout": {
"mode": "grid",
"gapY": 38,
"gapX": 72
},
"entities": [
{
"id": "customer",
"label": "customer",
"tag": "accounts",
"row": 0,
"col": 0,
"attributes": [
{
"name": "id",
"type": "bigint",
"key": "pk"
},
{
"name": "email",
"type": "varchar(255)",
"key": "uk"
},
{
"name": "display_name",
"type": "varchar(120)"
},
{
"name": "created_at",
"type": "timestamptz"
}
]
},
{
"id": "order",
"label": "order",
"tag": "checkout",
"row": 0,
"col": 1,
"width": 260,
"attributes": [
{
"name": "id",
"type": "bigint",
"key": "pk"
},
{
"name": "customer_id",
"type": "bigint",
"key": "fk",
"references": "customer.id"
},
{
"name": "status",
"type": "varchar(32)"
},
{
"name": "total_amount",
"type": "numeric(12,2)"
},
{
"name": "currency",
"type": "char(3)"
},
{
"name": "placed_at",
"type": "timestamptz"
},
{
"name": "updated_at",
"type": "timestamptz"
}
]
},
{
"id": "order_item",
"label": "order_item",
"tag": "line items",
"row": 1,
"col": 2,
"width": 254,
"attributes": [
{
"name": "id",
"type": "bigint",
"key": "pk"
},
{
"name": "order_id",
"type": "bigint",
"key": "fk",
"references": "order.id"
},
{
"name": "product_id",
"type": "bigint",
"key": "fk",
"references": "product.id"
},
{
"name": "quantity",
"type": "int"
},
{
"name": "unit_price",
"type": "numeric(12,2)"
},
{
"name": "discount_amount",
"type": "numeric(12,2)"
}
]
},
{
"id": "product",
"label": "product",
"tag": "catalog",
"row": 1,
"col": 1,
"attributes": [
{
"name": "id",
"type": "bigint",
"key": "pk"
},
{
"name": "sku",
"type": "varchar(64)",
"key": "uk"
},
{
"name": "name",
"type": "varchar(160)"
},
{
"name": "price",
"type": "numeric(12,2)"
},
{
"name": "cost_amount",
"type": "numeric(12,2)"
},
{
"name": "active",
"type": "boolean"
},
{
"name": "created_at",
"type": "timestamptz"
}
]
},
{
"id": "inventory",
"label": "inventory",
"tag": "catalog",
"row": 1,
"col": 0,
"attributes": [
{
"name": "id",
"type": "bigint",
"key": "pk"
},
{
"name": "product_id",
"type": "bigint",
"key": "fk",
"references": "product.id"
},
{
"name": "warehouse_code",
"type": "varchar(16)"
},
{
"name": "quantity",
"type": "int"
},
{
"name": "reserved_quantity",
"type": "int"
},
{
"name": "updated_at",
"type": "timestamptz"
}
],
"width": 236
},
{
"id": "payment",
"label": "payment",
"tag": "checkout",
"row": 0,
"col": 2,
"attributes": [
{
"name": "id",
"type": "bigint",
"key": "pk"
},
{
"name": "order_id",
"type": "bigint",
"key": "fk",
"references": "order.id"
},
{
"name": "method",
"type": "varchar(32)"
},
{
"name": "amount",
"type": "numeric(12,2)"
},
{
"name": "paid_at",
"type": "timestamptz"
},
{
"name": "external_ref",
"type": "varchar(64)"
}
]
}
],
"relationships": [
{
"id": "order_customer",
"from": "order",
"to": "customer",
"label": "placed by",
"fromCardinality": "many",
"toCardinality": "one"
},
{
"id": "payment_order",
"from": "payment",
"to": "order",
"fromCardinality": "many",
"fromOptional": true,
"toCardinality": "one",
"identifying": false
},
{
"id": "order_item_order",
"from": "order_item",
"to": "order",
"fromCardinality": "many",
"toCardinality": "one"
},
{
"id": "order_item_product",
"from": "order_item",
"to": "product",
"fromCardinality": "many",
"toCardinality": "one"
},
{
"id": "inventory_product",
"from": "inventory",
"to": "product",
"fromCardinality": "many",
"toCardinality": "one"
}
],
"cards": [
{
"dot": "cyan",
"title": "Keys",
"items": [
"Every child carries the parent id as a bigint foreign key.",
"order is the hub: order_item and payment each hold an order_id.",
"email and sku are unique, so they carry a secondary key marker."
]
},
{
"dot": "amber",
"title": "Optionality",
"items": [
"An order may exist before any payment attempt, so the payment side is zero or many.",
"The payment relationship is non-identifying: it is drawn dashed.",
"customer, product, and order_item links are all mandatory."
]
},
{
"dot": "emerald",
"title": "How the bands read",
"items": [
"The checkout band is the order and the payment that settles it.",
"The catalog band is what orders point at: one product, one stock record.",
"accounts and line items stand alone; a single-table domain keeps its tag in the table header."
]
}
]
}