troogs
e589cc170a
- Step-by-step prompts for solution skeleton, domain model, DbContext mappings, application services, UI shell/pages, PDF export, and tests/validation
64 lines
1.8 KiB
Markdown
64 lines
1.8 KiB
Markdown
---
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description: "Implement the EF Core entity classes and enums for Account, AccountYear, Entry, TransferLink, and EntryType"
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agent: "agent"
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---
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# Step 2: Domain Model
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Implement the domain entities under `src/Duempelkas.Domain`.
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## Entities
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### Account (`Entities/Account.cs`)
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- `int Id` (PK)
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- `string Name` (required, max 200)
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- `DateTime CreatedUtc`
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- `ICollection<AccountYear> AccountYears` (navigation)
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### AccountYear (`Entities/AccountYear.cs`)
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- `int Id` (PK)
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- `int AccountId` (FK → Account)
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- `int Year` (e.g. 2026)
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- `decimal OpeningBalance` — explicit carryover from the previous year, user-entered
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- `DateTime CreatedUtc`
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- `Account Account` (navigation)
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- `ICollection<Entry> Entries` (navigation)
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Constraint: unique on `(AccountId, Year)`.
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### Entry (`Entities/Entry.cs`)
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- `int Id` (PK)
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- `int AccountYearId` (FK → AccountYear)
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- `EntryType Type` — Income or Expense
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- `DateTime Date`
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- `string Title` (required, max 500)
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- `decimal Amount` — always positive; sign determined by Type
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- `int? TransferLinkId` (FK → TransferLink, nullable)
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- `DateTime CreatedUtc`
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- `AccountYear AccountYear` (navigation)
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- `TransferLink? TransferLink` (navigation)
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### TransferLink (`Entities/TransferLink.cs`)
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- `int Id` (PK)
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- `int SourceEntryId` (FK → Entry, unique)
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- `int TargetEntryId` (FK → Entry, unique)
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- `string? Note`
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- `DateTime CreatedUtc`
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- `Entry SourceEntry` (navigation)
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- `Entry TargetEntry` (navigation)
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Invariants enforced at service level:
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- SourceEntry.Type must be Expense
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- TargetEntry.Type must be Income
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- Both share the same Amount and Date
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### EntryType (`Enums/EntryType.cs`)
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```csharp
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public enum EntryType { Income = 0, Expense = 1 }
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```
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## Conventions
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- Use `decimal` for all monetary amounts.
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- Store amounts as positive; behaviour (add/subtract) comes from `EntryType`.
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- File-scoped namespaces, nullable enabled.
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