Lyo.Note.Postgres 1.0.3

Lyo.Note.Postgres

PostgreSQL implementation of Lyo.Note using Entity Framework Core. Persists notes to the note.note table (schema constant: PostgresNoteOptions.Schema = "note") with migrations support. Notes have subject / actor entity references (for_entity_* / from_entity_*).

PostgresNoteStore implements INoteStore and Lyo.Health.IHealth (HealthCheckName = "note-postgres"), so registering the store also wires up a liveness probe.

Examples

Usage

services.AddPostgresNoteStore(new PostgresNoteOptions {
    ConnectionString = "...",
    EnableAutoMigrations = true
});

Usage (2)

{
  "PostgresNote": {
    "ConnectionString": "Host=localhost;Database=note;...",
    "EnableAutoMigrations": true
  }
}

Usage (3)

services.AddPostgresNoteStoreFromConfiguration(configuration);

Example: a user writes a note about a docket

await noteStore.SaveAsync(new NoteRecord {
    SubjectEntityType = "Docket",
    SubjectEntityId = docketId.ToString(),
    ActorEntityType = "User",
    ActorEntityId = userId.ToString(),
    Content = "Follow up next week"
});

// Update by passing the same Id back through SaveAsync.
var existing = await noteStore.GetByIdAsync(noteId);
existing!.Content = "Follow up tomorrow";
await noteStore.SaveAsync(existing);

Migrations

export NOTE_CONNECTION_STRING="Host=localhost;Database=note;Username=postgres;Password=postgres"
dotnet ef migrations add MigrationName --project Features/Note/Lyo.Note.Postgres

DI extensions

• AddNoteDbContextFactory(Action<PostgresNoteOptions>) / AddNoteDbContextFactory(PostgresNoteOptions) — register only the IDbContextFactory<NoteDbContext>.
• AddNoteDbContextFactoryFromConfiguration(IConfiguration, string sectionName = PostgresNoteOptions.SectionName) — same, bound from configuration (default section: PostgresNote).
• AddPostgresNoteStore(Action<PostgresNoteOptions>) / AddPostgresNoteStore(PostgresNoteOptions) — register the DbContext factory and the INoteStore singleton.
• AddPostgresNoteStoreFromConfiguration(IConfiguration, string sectionName = PostgresNoteOptions.SectionName) — register the store using configuration binding.

Usage

Or with configuration:

Entity Reference

Uses Lyo.EntityReference.Models.EntityRef with generic or string-based creation:

// Generic: uses typeof(T).FullName, keys joined with ":"
var forDocket = EntityRef.For<Docket>(docketId);
var fromUser = EntityRef.For<User>(123);
var composite = EntityRef.For<Order>("ord-1", "line-2");

// String-based
var forEntity = EntityRef.ForGuid("Docket", docketGuid);
var fromEntity = EntityRef.ForKey("User", "123");

Schema

• note.note — EntityRelationEntityBase: id (uuid), subject/actor columns (for_entity_type, for_entity_id, from_entity_type, from_entity_id — nullable varchar 128/256), tenant_id, context, visibility, created_at, expires_at, deleted_at, deleted_by_type, deleted_by_id, metadata (jsonb), plus note-specific content and updated_timestamp.

Tenancy

PostgresNoteStore accepts an optional Guid? tenantId on every read/write method and resolves it through TenancyResolver under the policy configured in PostgresNoteOptions.Tenancy (inheriting from EntityRefOptions.Mode when unset). The tenant_id column is non-null, so only SingleTenantDefault and MultiTenantStrict modes are valid — SystemOnly is rejected at store construction. The store applies a WhereTenant filter on every query so notes from one tenant cannot leak into another. See Lyo.EntityReference.Postgres for the full policy matrix and appsettings.json snippet.

{
  "PostgresNote": {
    "ConnectionString": "Host=localhost;Database=lyo;...",
    "Tenancy": { "Mode": "MultiTenantStrict" }
  }
}

Dependencies

Generated from ProjectReference / PackageReference (same model as docs/Lyo.ProjectGraph.html).

• Lyo.EntityReference.Models — (direct, lyo)
• Lyo.EntityReference.Postgres — (direct, lyo)
• Lyo.Exceptions — (direct, lyo)
• Lyo.Health — (direct, lyo)
• Lyo.Note — (direct, lyo)
• Lyo.Postgres — (direct, lyo)
• Microsoft.EntityFrameworkCore 10.0.5 — (direct, microsoft)
• Microsoft.EntityFrameworkCore.Design 10.0.5 — (direct, microsoft)
• Microsoft.Extensions.Configuration.Binder 10.0.5 — (direct, microsoft)
• Lyo.Common — (transitive, lyo)
• Microsoft.EntityFrameworkCore.Relational 10.0.5 — (transitive, microsoft)
• Microsoft.Extensions.DependencyInjection.Abstractions 10.0.5 — (transitive, microsoft)
• Microsoft.Extensions.Hosting.Abstractions 10.0.5 — (transitive, microsoft)
• Microsoft.Extensions.Logging.Abstractions 10.0.5 — (transitive, microsoft)
• Microsoft.Extensions.Options 10.0.5 — (transitive, microsoft)
• Microsoft.Extensions.Options.ConfigurationExtensions 10.0.5 — (transitive, microsoft)
• Npgsql.EntityFrameworkCore.PostgreSQL 10.0.3 — (transitive, third-party)
• System.Memory 4.6.3 — (transitive, microsoft, netstandard2.0)
• System.Text.Json 10.0.5 — (transitive, microsoft, netstandard2.0)