diff --git a/.idea/.idea.HopFrame/.idea/workspace.xml b/.idea/.idea.HopFrame/.idea/workspace.xml
index cafd9ca..3892c01 100644
--- a/.idea/.idea.HopFrame/.idea/workspace.xml
+++ b/.idea/.idea.HopFrame/.idea/workspace.xml
@@ -9,14 +9,11 @@
     <option name="autoReloadType" value="SELECTIVE" />
   </component>
   <component name="ChangeListManager">
-    <list default="true" id="0648788e-7696-4e60-bf12-5d5601f33d8c" name="Changes" comment="Added relation picker dialog">
+    <list default="true" id="0648788e-7696-4e60-bf12-5d5601f33d8c" name="Changes" comment="Added automatic relation mapping">
       <change beforePath="$PROJECT_DIR$/.idea/.idea.HopFrame/.idea/workspace.xml" beforeDir="false" afterPath="$PROJECT_DIR$/.idea/.idea.HopFrame/.idea/workspace.xml" afterDir="false" />
       <change beforePath="$PROJECT_DIR$/src/HopFrame.Core/Config/PropertyConfig.cs" beforeDir="false" afterPath="$PROJECT_DIR$/src/HopFrame.Core/Config/PropertyConfig.cs" afterDir="false" />
-      <change beforePath="$PROJECT_DIR$/src/HopFrame.Core/Config/TableConfig.cs" beforeDir="false" afterPath="$PROJECT_DIR$/src/HopFrame.Core/Config/TableConfig.cs" afterDir="false" />
-      <change beforePath="$PROJECT_DIR$/src/HopFrame.Core/Services/IContextExplorer.cs" beforeDir="false" afterPath="$PROJECT_DIR$/src/HopFrame.Core/Services/IContextExplorer.cs" afterDir="false" />
       <change beforePath="$PROJECT_DIR$/src/HopFrame.Core/Services/Implementations/ContextExplorer.cs" beforeDir="false" afterPath="$PROJECT_DIR$/src/HopFrame.Core/Services/Implementations/ContextExplorer.cs" afterDir="false" />
-      <change beforePath="$PROJECT_DIR$/src/HopFrame.Web/Components/Dialogs/HopFrameRelationPicker.razor" beforeDir="false" afterPath="$PROJECT_DIR$/src/HopFrame.Web/Components/Dialogs/HopFrameRelationPicker.razor" afterDir="false" />
-      <change beforePath="$PROJECT_DIR$/src/HopFrame.Web/Components/Pages/HopFrameTablePage.razor" beforeDir="false" afterPath="$PROJECT_DIR$/src/HopFrame.Web/Components/Pages/HopFrameTablePage.razor" afterDir="false" />
+      <change beforePath="$PROJECT_DIR$/src/HopFrame.Web/Components/Dialogs/HopFrameEditor.razor" beforeDir="false" afterPath="$PROJECT_DIR$/src/HopFrame.Web/Components/Dialogs/HopFrameEditor.razor" afterDir="false" />
       <change beforePath="$PROJECT_DIR$/testing/HopFrame.Testing/Program.cs" beforeDir="false" afterPath="$PROJECT_DIR$/testing/HopFrame.Testing/Program.cs" afterDir="false" />
     </list>
     <option name="SHOW_DIALOG" value="false" />
@@ -151,7 +148,7 @@
       <workItem from="1736875984621" duration="8464000" />
       <workItem from="1736884461354" duration="1075000" />
       <workItem from="1736962119221" duration="8119000" />
-      <workItem from="1737021098746" duration="16566000" />
+      <workItem from="1737021098746" duration="19408000" />
     </task>
     <task id="LOCAL-00001" summary="Added basic configuration">
       <option name="closed" value="true" />
@@ -209,7 +206,15 @@
       <option name="project" value="LOCAL" />
       <updated>1737035288104</updated>
     </task>
-    <option name="localTasksCounter" value="8" />
+    <task id="LOCAL-00008" summary="Added automatic relation mapping">
+      <option name="closed" value="true" />
+      <created>1737037853482</created>
+      <option name="number" value="00008" />
+      <option name="presentableId" value="LOCAL-00008" />
+      <option name="project" value="LOCAL" />
+      <updated>1737037853482</updated>
+    </task>
+    <option name="localTasksCounter" value="9" />
     <servers />
   </component>
   <component name="TypeScriptGeneratedFilesManager">
@@ -226,6 +231,7 @@
     <MESSAGE value="Added entry saving support" />
     <MESSAGE value="Added reload button and animation" />
     <MESSAGE value="Added relation picker dialog" />
-    <option name="LAST_COMMIT_MESSAGE" value="Added relation picker dialog" />
+    <MESSAGE value="Added automatic relation mapping" />
+    <option name="LAST_COMMIT_MESSAGE" value="Added automatic relation mapping" />
   </component>
 </project>
\ No newline at end of file
diff --git a/src/HopFrame.Core/Config/PropertyConfig.cs b/src/HopFrame.Core/Config/PropertyConfig.cs
index f477bf2..783edf0 100644
--- a/src/HopFrame.Core/Config/PropertyConfig.cs
+++ b/src/HopFrame.Core/Config/PropertyConfig.cs
@@ -14,11 +14,12 @@ public class PropertyConfig(PropertyInfo info, TableConfig table) {
     public Func<object, string>? Formatter { get; set; }
     public Func<string, object>? Parser { get; set; }
     public Func<object>? Template { get; set; }
+    public Func<object?, Task<IEnumerable<string>>>? Validator { get; set; }
     public bool Editable { get; set; } = true;
     public bool Creatable { get; set; } = true;
     public bool DisplayValue { get; set; } = true;
     public bool IsRelation { get; set; }
-    public bool IsPrimaryKey { get; set; }
+    public bool IsRequired { get; set; }
 }
 
 public class PropertyConfig<TProp>(PropertyConfig config) {
@@ -79,4 +80,14 @@ public class PropertyConfig<TProp>(PropertyConfig config) {
         InnerConfig.DisplayValue = display;
         return this;
     }
+
+    public PropertyConfig<TProp> Validator(Func<TProp?, IEnumerable<string>> validator) {
+        InnerConfig.Validator = obj => Task.FromResult(validator.Invoke((TProp?)obj));
+        return this;
+    }
+    
+    public PropertyConfig<TProp> Validator(Func<TProp?, Task<IEnumerable<string>>> validator) {
+        InnerConfig.Validator = obj => validator.Invoke((TProp?)obj);
+        return this;
+    }
 }
diff --git a/src/HopFrame.Core/Services/Implementations/ContextExplorer.cs b/src/HopFrame.Core/Services/Implementations/ContextExplorer.cs
index 895aad2..a8cc2de 100644
--- a/src/HopFrame.Core/Services/Implementations/ContextExplorer.cs
+++ b/src/HopFrame.Core/Services/Implementations/ContextExplorer.cs
@@ -65,6 +65,13 @@ internal sealed class ContextExplorer(HopFrameConfig config, IServiceProvider pr
             propConfig.IsRelation = true;
         }
         
+        foreach (var property in entity.GetProperties()) {
+            var propConfig = table.Properties
+                .SingleOrDefault(prop => prop.Info == property.PropertyInfo);
+            if (propConfig is null) continue;
+            propConfig.IsRequired = !property.IsNullable;
+        }
+        
         logger.LogInformation("Extracted information for table '" + table.PropertyName + "'");
         table.Seeded = true;
     }
diff --git a/src/HopFrame.Web/Components/Dialogs/HopFrameEditor.razor b/src/HopFrame.Web/Components/Dialogs/HopFrameEditor.razor
index 9c68af2..b2a334f 100644
--- a/src/HopFrame.Web/Components/Dialogs/HopFrameEditor.razor
+++ b/src/HopFrame.Web/Components/Dialogs/HopFrameEditor.razor
@@ -18,16 +18,16 @@
                         <FluentTextField
                             Label="@property.Name"
                             Value="@(GetPropertyValue<string>(property))"
-                            Disabled="@(!property.Editable)"
+                            Required="@property.IsRequired"
                             ReadOnly="true"
                             Style="width: 100%"
                             ValueChanged="@(v => SetPropertyValue(property, v, InputType.Text))" />
                     </div>
                     <div style="display: flex; gap: 5px; margin-bottom: 4px">
-                        <FluentButton OnClick="() => SetPropertyValue(property, null, InputType.Relation)">
+                        <FluentButton OnClick="() => SetPropertyValue(property, null, InputType.Relation)" Disabled="@(!property.Editable)">
                             <FluentIcon Value="@(new Icons.Regular.Size20.Dismiss())" Color="Color.Neutral" />
                         </FluentButton>
-                        <FluentButton OnClick="async () => await OpenRelationalPicker(property)">
+                        <FluentButton OnClick="async () => await OpenRelationalPicker(property)" Disabled="@(!property.Editable)">
                             <FluentIcon Value="@(new Icons.Regular.Size20.Open())" Color="Color.Neutral" />
                         </FluentButton>
                     </div>
@@ -40,6 +40,7 @@
                     Value="GetPropertyValue<double>(property)"
                     Style="width: 100%;"
                     Disabled="@(!property.Editable)"
+                    Required="@property.IsRequired"
                     ValueChanged="@(v => SetPropertyValue(property, v, InputType.Number))" />
             }
             else if (Type.GetTypeCode(property.Info.PropertyType) == TypeCode.Boolean) {
@@ -47,43 +48,48 @@
                     Label="@property.Name"
                     Value="GetPropertyValue<bool>(property)"
                     Disabled="@(!property.Editable)"
+                    Required="@property.IsRequired"
                     ValueChanged="@(v => SetPropertyValue(property, v, InputType.Switch))" />
             }
             else if (Type.GetTypeCode(property.Info.PropertyType) == TypeCode.DateTime) {
                 <div style="display: flex; gap: 10px">
                     <div style="display: flex; flex-direction: column; width: 100%">
-                        <FluentDatePicker 
-                            Label="@property.Name" 
+                        <FluentDatePicker
+                            Label="@property.Name"
                             Value="GetPropertyValue<DateTime>(property)"
                             Disabled="@(!property.Editable)"
+                            Required="@property.IsRequired"
                             ValueChanged="@(v => SetPropertyValue(property, v, InputType.Date))" />
                     </div>
                     <div style="display: flex; flex-direction: column; justify-content: flex-end">
-                        <FluentTimePicker 
+                        <FluentTimePicker
                             Value="GetPropertyValue<DateTime>(property)"
                             Disabled="@(!property.Editable)"
+                            Required="@property.IsRequired"
                             ValueChanged="@(v => SetPropertyValue(property, v, InputType.Time))" />
                     </div>
                 </div>
             }
             else if (property.Info.PropertyType == typeof(DateOnly)) {
-                <FluentDatePicker 
+                <FluentDatePicker
                     Label="@property.Name"
                     Value="GetPropertyValue<DateOnly>(property).ToDateTime(TimeOnly.MinValue)"
                     Style="width: 100%"
                     Disabled="@(!property.Editable)"
+                    Required="@property.IsRequired"
                     ValueChanged="@(v => SetPropertyValue(property, v, InputType.Date))" />
             }
             else if (property.Info.PropertyType == typeof(TimeOnly)) {
-                <FluentTimePicker 
+                <FluentTimePicker
                     Label="@property.Name"
                     Value="GetPropertyValue<TimeOnly>(property).ToDateTime()"
                     Style="width: 100%"
                     Disabled="@(!property.Editable)"
+                    Required="@property.IsRequired"
                     ValueChanged="@(v => SetPropertyValue(property, v, InputType.Time))" />
             }
             else if (property.Info.PropertyType.IsEnum) {
-                <FluentSelect 
+                <FluentSelect
                     TOption="string"
                     Label="@property.Name"
                     Items="Enum.GetNames(property.Info.PropertyType)"
@@ -91,16 +97,22 @@
                     Style="width: 100%"
                     Height="250px"
                     Disabled="@(!property.Editable)"
+                    Required="@property.IsRequired"
                     ValueChanged="@(v => SetPropertyValue(property, v, InputType.Enum))" />
             }
             else {
-                <FluentTextField 
+                <FluentTextField
                     Label="@property.Name"
                     Value="@(GetPropertyValue<string>(property))"
                     Style="width: 100%;"
                     Disabled="@(!property.Editable)"
+                    Required="@property.IsRequired"
                     ValueChanged="@(v => SetPropertyValue(property, v, InputType.Text))" />
             }
+            
+            @foreach (var error in _validationErrors[property.Info.Name]) {
+                <FluentLabel Color="@Color.Error">@error</FluentLabel>
+            }
         </div>
     }
 </FluentDialogBody>
@@ -117,14 +129,20 @@
 
     private bool _currentlyEditing;
     private ITableManager? _manager;
+    private Dictionary<string, List<string>> _validationErrors = new();
 
     protected override void OnInitialized() {
         _currentlyEditing = Content.CurrentObject is not null;
         Dialog.Instance.Parameters.Title = (_currentlyEditing ? "Edit " : "Add ") + Content.Config.TableType.Name;
         Dialog.Instance.Parameters.Width = "500px";
         Dialog.Instance.Parameters.PrimaryAction = "Save";
+        Dialog.Instance.Parameters.ValidateDialogAsync = ValidateInputs;
         _manager = Explorer.GetTableManager(Content.Config.PropertyName);
         Content.CurrentObject ??= Activator.CreateInstance(Content.Config.TableType);
+        
+        foreach (var property in Content.Config.Properties) {
+            _validationErrors.Add(property.Info.Name, []);
+        }
     }
 
     private TValue? GetPropertyValue<TValue>(PropertyConfig config) {
@@ -133,7 +151,7 @@
         var value = config.Info.GetValue(Content.CurrentObject);
 
         var newlyGenerated = false;
-        if (config.Info.PropertyType.IsDefaultValue(value) && config.Template is not null) {
+        if (config.Info.PropertyType.IsDefaultValue(value) && config.Template is not null && !_currentlyEditing) {
             value = config.Template.Invoke();
             newlyGenerated = true;
         }
@@ -177,20 +195,20 @@
                     
                 case InputType.Date:
                     if (config.Info.PropertyType == typeof(DateTime)) {
-                        var newDate = (DateOnly)value;
+                        var newDate = (DateTime)value;
                         var dateTime = GetPropertyValue<DateTime>(config);
                         result = new DateTime(newDate.Year, newDate.Month, newDate.Day, dateTime.Hour, dateTime.Minute, dateTime.Second, dateTime.Millisecond, dateTime.Microsecond);
                     }
-                    else result = (DateOnly)value;
+                    else result = DateOnly.FromDateTime((DateTime)value);
                     break;
                     
                 case InputType.Time:
                     if (config.Info.PropertyType == typeof(DateTime)) {
-                        var newTime = (TimeOnly)value;
+                        var newTime = (DateTime)value;
                         var dateTime = GetPropertyValue<DateTime>(config);
                         result = new DateTime(dateTime.Year, dateTime.Month, dateTime.Day, newTime.Hour, newTime.Minute, newTime.Second, newTime.Millisecond, newTime.Microsecond);
                     }
-                    else result = (TimeOnly)value;
+                    else result = TimeOnly.FromDateTime((DateTime)value);
                     break;
                     
                 case InputType.Relation:
@@ -221,6 +239,27 @@
         var data = (RelationPickerDialogData)result.Data!;
         SetPropertyValue(config, data.Object, InputType.Relation);
     }
+
+    private async Task<bool> ValidateInputs() {
+        foreach (var property in Content.Config.Properties) {
+            var errorList = _validationErrors[property.Info.Name];
+            errorList.Clear();
+            var value = property.Info.GetValue(Content.CurrentObject);
+
+            if (property.Validator is not null) {
+                errorList.AddRange(await property.Validator.Invoke(value));
+                continue;
+            }
+            
+            if (value is null && property.IsRequired)
+                errorList.Add("Value cannot be null");
+        }
+
+        StateHasChanged();
+        return _validationErrors
+            .Select(err => err.Value.Count)
+            .All(c => c == 0);
+    }
     
     private enum InputType {
         Number,
diff --git a/testing/HopFrame.Testing/Program.cs b/testing/HopFrame.Testing/Program.cs
index 62b1644..4dc0e58 100644
--- a/testing/HopFrame.Testing/Program.cs
+++ b/testing/HopFrame.Testing/Program.cs
@@ -49,6 +49,20 @@ builder.Services.AddHopFrame(options => {
         context.Table<Post>()
             .Property(p => p.CreatedAt)
             .ValueTemplate(() => DateTime.UtcNow);
+
+        context.Table<Post>()
+            .Property(p => p.Caption)
+            .Validator(input => {
+                var errors = new List<string>();
+                
+                if (input is null)
+                    errors.Add("Value cannot be null");
+                
+                if (input?.Length > 10)
+                    errors.Add("Value can only be 10 characters long");
+
+                return errors;
+            });
     });
 });