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admin
2026-08-12 17:45:02 +02:00
parent 0823a023c9
commit a1e722ace1
27 changed files with 542 additions and 197 deletions
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LehrerApp.Data/LiteDbContext.cs
+91 -4
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@@ -22,7 +22,7 @@ public class LiteDbContext : IDisposable
public ILiteCollection<Student> Students => _db.GetCollection<Student>("students");
public ILiteCollection<LearningGroup> Groups => _db.GetCollection<LearningGroup>("groups");
public ILiteCollection<Enrollment> Enrollments => _db.GetCollection<Enrollment>("enrollments");
public ILiteCollection<GroupMembership> Memberships => _db.GetCollection<GroupMembership>("group_memberships");
public ILiteCollection<Exam> Exams => _db.GetCollection<Exam>("exams");
public ILiteCollection<ExamResult> ExamResults => _db.GetCollection<ExamResult>("exam_results");
public ILiteCollection<Grade> Grades => _db.GetCollection<Grade>("grades");
@@ -42,7 +42,11 @@ public class LiteDbContext : IDisposable
private void MigrateExistingData()
{
MigrateMemberships();
RemoveRedundantLegacyFields();
var groups = _db.GetCollection<BsonDocument>("groups");
var subjects = _db.GetCollection<Subject>("subjects");
var missingArchiveState = groups.FindAll()
.Where(g => !g.ContainsKey(nameof(LearningGroup.IsActive)))
.ToList();
@@ -51,6 +55,83 @@ public class LiteDbContext : IDisposable
group[nameof(LearningGroup.IsActive)] = true;
groups.Update(group);
}
// Subject war anfangs nur als Text in der Gruppe gespeichert. Alte
// Werte werden einmalig an die Fachstammdaten angebunden und danach
// entfernt, damit es nur noch eine führende Fachbezeichnung gibt.
foreach (var group in groups.FindAll().ToList())
{
var changed = false;
var legacyName = group.TryGetValue("Subject", out var value) && value.IsString
? value.AsString.Trim()
: "";
var hasSubjectId = group.TryGetValue(nameof(LearningGroup.SubjectId), out var id)
&& id.IsGuid && subjects.FindById(id.AsGuid) is not null;
if (!hasSubjectId && legacyName.Length > 0)
{
var subject = subjects.FindAll().FirstOrDefault(s =>
string.Equals(s.Name.Trim(), legacyName, StringComparison.OrdinalIgnoreCase));
if (subject is null)
{
subject = new Subject { Name = legacyName };
subjects.Insert(subject);
}
group[nameof(LearningGroup.SubjectId)] = subject.Id;
changed = true;
}
else if (!hasSubjectId && group.ContainsKey(nameof(LearningGroup.SubjectId)))
{
group[nameof(LearningGroup.SubjectId)] = BsonValue.Null;
changed = true;
}
changed |= group.Remove("Subject");
if (changed) groups.Update(group);
}
}
private void MigrateMemberships()
{
const string oldName = "enrollments";
const string newName = "group_memberships";
var names = _db.GetCollectionNames().ToHashSet(StringComparer.OrdinalIgnoreCase);
if (names.Contains(oldName) && !names.Contains(newName))
_db.RenameCollection(oldName, newName);
var memberships = _db.GetCollection<BsonDocument>(newName);
foreach (var membership in memberships.FindAll().ToList())
{
var changed = false;
if (!membership.ContainsKey(nameof(GroupMembership.AddedOn)) &&
membership.TryGetValue("EnrolledAt", out var enrolledAt))
{
membership[nameof(GroupMembership.AddedOn)] = enrolledAt;
changed = true;
}
changed |= membership.Remove("EnrolledAt");
changed |= membership.Remove("SchoolYear");
if (changed) memberships.Update(membership);
}
}
private void RemoveRedundantLegacyFields()
{
RemoveFields("exams", "Subject");
RemoveFields("units", "Subject", "SchoolYear");
RemoveFields("grades", "SchoolYear");
RemoveFields("participation", "GroupId", "Date");
}
private void RemoveFields(string collectionName, params string[] fieldNames)
{
var collection = _db.GetCollection<BsonDocument>(collectionName);
foreach (var document in collection.FindAll().ToList())
{
var changed = false;
foreach (var fieldName in fieldNames) changed |= document.Remove(fieldName);
if (changed) collection.Update(document);
}
}
private void EnsureIndexes()
@@ -59,13 +140,16 @@ public class LiteDbContext : IDisposable
Students.EnsureIndex(x => x.IsActive);
Groups.EnsureIndex(x => x.SchoolYear);
Groups.EnsureIndex(x => x.IsActive);
Enrollments.EnsureIndex(x => x.StudentId);
Enrollments.EnsureIndex(x => x.GroupId);
Enrollments.EnsureIndex(x => x.SchoolYear);
Memberships.EnsureIndex(x => x.StudentId);
Memberships.EnsureIndex(x => x.GroupId);
Memberships.EnsureIndex("ux_student_group",
BsonExpression.Create("STRING($.StudentId) + ':' + STRING($.GroupId)"), unique: true);
Exams.EnsureIndex(x => x.GroupId);
Exams.EnsureIndex(x => x.Status);
ExamResults.EnsureIndex(x => x.ExamId);
ExamResults.EnsureIndex(x => x.StudentId);
ExamResults.EnsureIndex("ux_exam_student",
BsonExpression.Create("STRING($.ExamId) + ':' + STRING($.StudentId)"), unique: true);
Grades.EnsureIndex(x => x.StudentId);
Grades.EnsureIndex(x => x.GroupId);
GradingKeyTemplates.EnsureIndex(x => x.GradingSystem);
@@ -80,8 +164,11 @@ public class LiteDbContext : IDisposable
ParticipationSessions.EnsureIndex(x => x.Date);
ParticipationEntries.EnsureIndex(x => x.SessionId);
ParticipationEntries.EnsureIndex(x => x.StudentId);
ParticipationEntries.EnsureIndex("ux_session_student",
BsonExpression.Create("STRING($.SessionId) + ':' + STRING($.StudentId)"), unique: true);
ParticipationAspects.EnsureIndex(x => x.GroupId);
Subjects.EnsureIndex(x => x.Name);
Subjects.EnsureIndex("ux_subject_name", BsonExpression.Create("LOWER(TRIM($.Name))"), unique: true);
CompetencyDomains.EnsureIndex(x => x.SubjectId);
CompetencyDomains.EnsureIndex(x => x.GradeLevel);
}