Exemple #1
0
        /// <summary>
        /// Save audit entities where the value of some properties were unknown at previous step.
        /// &lt;br/&gt;&lt;br/&gt;
        /// https://www.meziantou.net/entity-framework-core-history-audit-table.htm
        /// </summary>
        /// <method>OnAfterSaveChangesAsync(List&lt;AuditEntry&gt; auditEntries)</method>
        private Task OnAfterSaveChangesAsync(List <AuditEntry> auditEntries)
        {
            if (auditEntries == null || auditEntries.Count == 0)
            {
                return(Task.CompletedTask);
            }

            foreach (var auditEntry in auditEntries)
            {
                // Get the final value of the temporary properties
                foreach (var prop in auditEntry.TemporaryProperties)
                {
                    if (prop.Metadata.IsPrimaryKey())
                    {
                        auditEntry.KeyValues[prop.Metadata.Name] = prop.CurrentValue;
                    }
                    else
                    {
                        auditEntry.CurrentValues[prop.Metadata.Name] = prop.CurrentValue;
                    }
                }

                // Save the Audit entry
                AuditHistory.Add(auditEntry.ToAuditHistory());
            }

            return(SaveChangesAsync());
        }
Exemple #2
0
        /// <summary>
        /// Audit History record to write
        /// </summary>
        /// <method>ToAuditHistory()</method>
        public AuditHistory ToAuditHistory()
        {
            string file = this.GetType().Assembly.Location;
            string app  = System.IO.Path.GetFileNameWithoutExtension(file);

            var auditHistory = new AuditHistory();

            auditHistory.Entity         = TableName;
            auditHistory.State          = State;
            auditHistory.Application    = app;
            auditHistory.ModifiedBy     = ModifiedBy;
            auditHistory.ModifiedOn     = ModifiedOn;
            auditHistory.KeyValues      = JsonConvert.SerializeObject(KeyValues);
            auditHistory.OriginalValues = OriginalValues.Count == 0 ? null : JsonConvert.SerializeObject(OriginalValues);
            auditHistory.CurrentValues  = CurrentValues.Count == 0 ? null : JsonConvert.SerializeObject(CurrentValues);
            return(auditHistory);
        }
Exemple #3
0
        /// <summary>
        /// Save audit entities that have all the modifications and return list of entries
        /// where the value of some properties are unknown at this step.
        /// &lt;br/&gt;&lt;br/&gt;
        /// https://www.meziantou.net/entity-framework-core-history-audit-table.htm
        /// </summary>
        /// <returns>List&lt;AuditEntry&gt;</returns>
        /// <method>OnBeforeSaveChanges(string userId)</method>
        private List <AuditEntry> OnBeforeSaveChanges(string userId)
        {
            ChangeTracker.DetectChanges();
            var auditEntries = new List <AuditEntry>();

            foreach (var entry in ChangeTracker.Entries())
            {
                if (entry.Entity is AuditHistory || entry.State == EntityState.Detached || entry.State == EntityState.Unchanged)
                {
                    continue;
                }

                var auditEntry = new AuditEntry(entry);
                auditEntry.TableName  = entry.Metadata.GetTableName();
                auditEntry.ModifiedBy = userId;
                auditEntry.ModifiedOn = DateTime.UtcNow;
                auditEntry.State      = entry.State.ToString();
                auditEntries.Add(auditEntry);

                foreach (var property in entry.Properties)
                {
                    if (property.IsTemporary)
                    {
                        // value will be generated by the database, get the value after saving
                        auditEntry.TemporaryProperties.Add(property);
                        continue;
                    }

                    string propertyName = property.Metadata.Name;
                    if (property.Metadata.IsPrimaryKey())
                    {
                        auditEntry.KeyValues[propertyName] = property.CurrentValue;
                        continue;
                    }

                    switch (entry.State)
                    {
                    case EntityState.Added:
                        auditEntry.CurrentValues[propertyName] = property.CurrentValue;
                        break;

                    case EntityState.Deleted:
                        auditEntry.OriginalValues[propertyName] = property.OriginalValue;
                        break;

                    case EntityState.Modified:
                        if (property.IsModified)
                        {
                            auditEntry.OriginalValues[propertyName] = property.OriginalValue;
                            auditEntry.CurrentValues[propertyName]  = property.CurrentValue;
                        }
                        break;
                    }
                }
            }

            // Save audit entities that have all the modifications
            foreach (var auditEntry in auditEntries.Where(_ => !_.HasTemporaryProperties))
            {
                AuditHistory.Add(auditEntry.ToAuditHistory());
            }

            // keep a list of entries where the value of some properties are unknown at this step
            return(auditEntries.Where(_ => _.HasTemporaryProperties).ToList());
        }