diff --git a/src/main/java/ru/ulstu/fc/rule/controller/RuleController.java b/src/main/java/ru/ulstu/fc/rule/controller/RuleController.java
index 602bf68..597a9e9 100644
--- a/src/main/java/ru/ulstu/fc/rule/controller/RuleController.java
+++ b/src/main/java/ru/ulstu/fc/rule/controller/RuleController.java
@@ -2,11 +2,13 @@ package ru.ulstu.fc.rule.controller;
 
 import org.springframework.stereotype.Controller;
 import org.springframework.ui.Model;
+import org.springframework.validation.BindingResult;
 import org.springframework.web.bind.annotation.GetMapping;
 import org.springframework.web.bind.annotation.PathVariable;
 import org.springframework.web.bind.annotation.PostMapping;
 import org.springframework.web.bind.annotation.RequestMapping;
 
+import jakarta.validation.Valid;
 import ru.ulstu.fc.rule.model.FuzzyRuleForm;
 import ru.ulstu.fc.rule.service.FuzzyRuleService;
 
@@ -23,7 +25,7 @@ public class RuleController {
     public String edit(@PathVariable(value = "projectId") Integer projectId,
             @PathVariable(value = "ruleId") Integer id, Model model) {
         model.addAttribute("projectId", projectId);
-        model.addAttribute("rule",
+        model.addAttribute("fuzzyRuleForm",
                 new FuzzyRuleForm(id, (id != null && id != 0)
                         ? ruleService.getById(id).getProject().getId()
                         : projectId));
@@ -32,16 +34,20 @@ public class RuleController {
     }
 
     @PostMapping(value = "save", params = "save")
-    public String save(FuzzyRuleForm ruleForm, Model model) {
-        model.addAttribute("rule", ruleService.save(ruleForm));
-        return "redirect:/project/edit/" + ruleForm.getProjectId();
+    public String save(@Valid FuzzyRuleForm fuzzyRuleForm, BindingResult bindingResult, Model model) {
+        if (bindingResult.hasErrors()) {
+            model.addAttribute("projectId", fuzzyRuleForm.getProjectId());
+            return "rule/edit";
+        }
+        ruleService.save(fuzzyRuleForm);
+        return "redirect:/project/edit/" + fuzzyRuleForm.getProjectId();
     }
 
     @PostMapping(value = "save", params = "delete")
-    public String delete(FuzzyRuleForm ruleForm) {
-        if (ruleForm != null && ruleForm.getId() != null) {
-            ruleService.delete(ruleForm);
+    public String delete(FuzzyRuleForm fuzzyRuleForm) {
+        if (fuzzyRuleForm != null && fuzzyRuleForm.getId() != null) {
+            ruleService.delete(fuzzyRuleForm);
         }
-        return "redirect:/project/edit/" + ruleForm.getProjectId();
+        return "redirect:/project/edit/" + fuzzyRuleForm.getProjectId();
     }
 }
diff --git a/src/main/java/ru/ulstu/fc/rule/controller/VariableController.java b/src/main/java/ru/ulstu/fc/rule/controller/VariableController.java
index ce79620..2d53c76 100644
--- a/src/main/java/ru/ulstu/fc/rule/controller/VariableController.java
+++ b/src/main/java/ru/ulstu/fc/rule/controller/VariableController.java
@@ -2,11 +2,14 @@ package ru.ulstu.fc.rule.controller;
 
 import org.springframework.stereotype.Controller;
 import org.springframework.ui.Model;
+import org.springframework.validation.BindingResult;
 import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.ModelAttribute;
 import org.springframework.web.bind.annotation.PathVariable;
 import org.springframework.web.bind.annotation.PostMapping;
 import org.springframework.web.bind.annotation.RequestMapping;
 
+import jakarta.validation.Valid;
 import ru.ulstu.fc.rule.model.VariableForm;
 import ru.ulstu.fc.rule.service.VariableService;
 
@@ -23,7 +26,7 @@ public class VariableController {
     public String edit(@PathVariable(value = "projectId") Integer projectId,
             @PathVariable(value = "varId") Integer id, Model model) {
         model.addAttribute("projectId", projectId);
-        model.addAttribute("var",
+        model.addAttribute("variableForm",
                 new VariableForm(id, (id != null && id != 0)
                         ? variableService.getById(id).getProject().getId()
                         : projectId));
@@ -32,8 +35,12 @@ public class VariableController {
     }
 
     @PostMapping(value = "save", params = "save")
-    public String save(VariableForm variableForm, Model model) {
-        model.addAttribute("rule", variableService.save(variableForm));
+    public String save(@Valid VariableForm variableForm, BindingResult result, Model model) {
+        if (result.hasErrors()) {
+            model.addAttribute("projectId", variableForm.getProjectId());
+            return "var/edit";
+        }
+        variableService.save(variableForm);
         return "redirect:/project/edit/" + variableForm.getProjectId();
     }
 
diff --git a/src/main/java/ru/ulstu/fc/rule/model/FuzzyRule.java b/src/main/java/ru/ulstu/fc/rule/model/FuzzyRule.java
index bc730ce..04b07ec 100644
--- a/src/main/java/ru/ulstu/fc/rule/model/FuzzyRule.java
+++ b/src/main/java/ru/ulstu/fc/rule/model/FuzzyRule.java
@@ -2,13 +2,17 @@ package ru.ulstu.fc.rule.model;
 
 import jakarta.persistence.Entity;
 import jakarta.persistence.ManyToOne;
+import jakarta.validation.constraints.NotNull;
+import jakarta.validation.constraints.Size;
 import ru.ulstu.fc.core.model.BaseEntity;
 import ru.ulstu.fc.project.model.Project;
 
 @Entity
 public class FuzzyRule extends BaseEntity {
     @ManyToOne
+    @NotNull
     private Project project;
+    @Size(min = 5, max = 250, message = "Длина от 5 до 250 символов")
     private String content;
 
     public FuzzyRule() {
diff --git a/src/main/java/ru/ulstu/fc/rule/model/FuzzyRuleForm.java b/src/main/java/ru/ulstu/fc/rule/model/FuzzyRuleForm.java
index 9599573..43c5f69 100644
--- a/src/main/java/ru/ulstu/fc/rule/model/FuzzyRuleForm.java
+++ b/src/main/java/ru/ulstu/fc/rule/model/FuzzyRuleForm.java
@@ -1,8 +1,14 @@
 package ru.ulstu.fc.rule.model;
 
+import jakarta.validation.constraints.NotNull;
+import jakarta.validation.constraints.Size;
+
 public class FuzzyRuleForm {
     private Integer id;
+    @NotNull
     private Integer projectId;
+
+    @Size(min = 5, max = 250, message = "Длина от 5 до 250 символов")
     private String content;
 
     public FuzzyRuleForm() {
diff --git a/src/main/java/ru/ulstu/fc/rule/model/Variable.java b/src/main/java/ru/ulstu/fc/rule/model/Variable.java
index c58cb77..c8d1f5f 100644
--- a/src/main/java/ru/ulstu/fc/rule/model/Variable.java
+++ b/src/main/java/ru/ulstu/fc/rule/model/Variable.java
@@ -9,15 +9,22 @@ import jakarta.persistence.FetchType;
 import jakarta.persistence.JoinColumn;
 import jakarta.persistence.ManyToOne;
 import jakarta.persistence.OneToMany;
+import jakarta.validation.constraints.NotNull;
+import jakarta.validation.constraints.Size;
 import ru.ulstu.fc.core.model.BaseEntity;
 import ru.ulstu.fc.project.model.Project;
 
 @Entity
 public class Variable extends BaseEntity {
+    @Size(min = 3, max = 250, message = "Длина должна быть от 3 до 250")
     private String name;
+    
     @ManyToOne
+    @NotNull
     private Project project;
+    
     private boolean isInput = true;
+    
     @OneToMany(cascade = CascadeType.ALL, fetch = FetchType.LAZY)
     @JoinColumn(name = "variable_id", unique = true)
     private List<FuzzyTerm> fuzzyTerms = new ArrayList<>();
diff --git a/src/main/java/ru/ulstu/fc/rule/model/VariableForm.java b/src/main/java/ru/ulstu/fc/rule/model/VariableForm.java
index 803290b..a8e5200 100644
--- a/src/main/java/ru/ulstu/fc/rule/model/VariableForm.java
+++ b/src/main/java/ru/ulstu/fc/rule/model/VariableForm.java
@@ -1,8 +1,13 @@
 package ru.ulstu.fc.rule.model;
 
+import jakarta.validation.constraints.NotNull;
+import jakarta.validation.constraints.Size;
+
 public class VariableForm {
     private Integer id;
+    @NotNull
     private Integer projectId;
+    @Size(min = 3, max = 250, message = "Длина должна быть от 3 до 250")
     private String name;
 
     public VariableForm() {
diff --git a/src/main/java/ru/ulstu/fc/rule/service/VariableService.java b/src/main/java/ru/ulstu/fc/rule/service/VariableService.java
index 8ce8003..88af77d 100644
--- a/src/main/java/ru/ulstu/fc/rule/service/VariableService.java
+++ b/src/main/java/ru/ulstu/fc/rule/service/VariableService.java
@@ -2,10 +2,10 @@ package ru.ulstu.fc.rule.service;
 
 import org.springframework.stereotype.Service;
 
-import ru.ulstu.fc.rule.repository.VariableRepository;
 import ru.ulstu.fc.project.service.ProjectService;
 import ru.ulstu.fc.rule.model.Variable;
 import ru.ulstu.fc.rule.model.VariableForm;
+import ru.ulstu.fc.rule.repository.VariableRepository;
 
 @Service
 public class VariableService {
diff --git a/src/main/resources/templates/rule/edit.html b/src/main/resources/templates/rule/edit.html
index a0be167..1b16584 100644
--- a/src/main/resources/templates/rule/edit.html
+++ b/src/main/resources/templates/rule/edit.html
@@ -8,7 +8,7 @@
 </head>
 <div class="container" layout:fragment="content">
     <h3>Редактирование правила:</h3>
-    <form th:action="@{/rule/save}" th:object="${rule}" method="post">
+    <form th:action="@{/rule/save}" th:object="${fuzzyRuleForm}" method="post">
         <input type="hidden" th:field="*{projectId}">
         <input type="hidden" th:field="*{id}">
         <div class="form-group">
diff --git a/src/main/resources/templates/var/edit.html b/src/main/resources/templates/var/edit.html
index c514ab9..4696923 100644
--- a/src/main/resources/templates/var/edit.html
+++ b/src/main/resources/templates/var/edit.html
@@ -8,7 +8,7 @@
 </head>
 <div class="container" layout:fragment="content">
     <h3>Редактирование переменной:</h3>
-    <form th:action="@{/var/save}" th:object="${var}" method="post">
+    <form th:action="@{/var/save}" th:object="${variableForm}" method="post">
         <input type="hidden" th:field="*{projectId}">
         <input type="hidden" th:field="*{id}">
         <div class="form-group">
@@ -20,7 +20,7 @@
                    class="form-control"
                    placeholder="Переменная">
             <p th:if="${#fields.hasErrors('name')}"
-               th:class="${#fields.hasErrors('name')}? error">
+               th:class="${#fields.hasErrors('name')} ? error">
                 Не может быть пустым
             </p>
         </div>