diff --git a/ereuse_devicehub/inventory/forms.py b/ereuse_devicehub/inventory/forms.py
index 48a42928..5c233e66 100644
--- a/ereuse_devicehub/inventory/forms.py
+++ b/ereuse_devicehub/inventory/forms.py
@@ -1,10 +1,8 @@
 import json
-import teal
 from flask_wtf import FlaskForm
-from wtforms import StringField, validators, MultipleFileField
-from flask import g, request, app
+from wtforms import StringField, validators, MultipleFileField, FloatField, IntegerField
+from flask import g, request
 from sqlalchemy.util import OrderedSet
-from psycopg2.errors import UniqueViolation
 from json.decoder import JSONDecodeError
 
 from ereuse_devicehub.db import db
@@ -142,11 +140,7 @@ class UploadSnapshotForm(FlaskForm):
             path_snapshot = save_json(snapshot_json, self.tmp_snapshots, g.user.email)
             snapshot_json.pop('debug', None)
             snapshot_json = schema.load(snapshot_json)
-            try:
-                response = self.build(snapshot_json)
-            except teal.db.DBError as error:
-                self.result[filename] = 'Error: {0}'.format(error.code)
-                break
+            response = self.build(snapshot_json)
 
             if hasattr(response, 'type'):
                 self.result[filename] = 'Ok'
@@ -225,15 +219,15 @@ class NewDeviceForm(FlaskForm):
     appearance = StringField(u'Appearance')
     functionality = StringField(u'Functionality')
     brand = StringField(u'Brand')
-    generation = StringField(u'Generation')
+    generation = IntegerField(u'Generation')
     version = StringField(u'Version')
-    weight = StringField(u'Weight')
-    width = StringField(u'Width')
-    height = StringField(u'Height')
-    depth = StringField(u'Depth')
+    weight = FloatField(u'Weight', [validators.DataRequired()])
+    width = FloatField(u'Width', [validators.DataRequired()])
+    height = FloatField(u'Height', [validators.DataRequired()])
+    depth = FloatField(u'Depth', [validators.DataRequired()])
     variant = StringField(u'Variant')
     sku = StringField(u'SKU')
-    image = StringField(u'Image')
+    image = StringField(u'Image', [validators.Optional(), validators.URL()])
     imei = StringField(u'IMEI')
     meid = StringField(u'MEID')
     resolution = StringField(u'Resolution width')
@@ -248,14 +242,53 @@ class NewDeviceForm(FlaskForm):
                         "Mouse": Mouse,
                         "Keyboard": Keyboard,
                         "SAI": SAI,
-                        "MemoryCardReader": MemoryCardReader,
-        }
+                        "MemoryCardReader": MemoryCardReader}
+
+        if not self.generation.data:
+            self.generation.data = 0
+
+        if not self.weight.data:
+            self.weight.data = 0.1
+
+        if not self.height.data:
+            self.height.data = 0.1
+
+        if not self.width.data:
+            self.width.data = 0.1
+
+        if not self.depth.data:
+            self.depth.data = 0.1
+
         if self.type.data:
             self.instance = self.devices[self.type.data]()
             self.populate_obj(self.instance)
 
+    def validate(self, extra_validators=None):
+        is_valid = super().validate(extra_validators)
+
+        if not is_valid:
+            return False
+
+        if self.generation.data < 0:
+            return False
+
+        if self.weight.data < 0.1:
+            return False
+
+        if self.height.data < 0.1:
+            return False
+
+        if self.width.data < 0.1:
+            return False
+
+        if self.depth.data < 0.1:
+            return False
+
+        return True
+
     def save(self):
         db.session.add(self.instance)
+        import pdb; pdb.set_trace()
         db.session.commit()
         return self.instance
 
@@ -265,6 +298,3 @@ class NewActionForm(FlaskForm):
     date = StringField(u'Date')
     severity = StringField(u'Severity')
     description = StringField(u'Description')
-
-    def save(self):
-        pass
diff --git a/ereuse_devicehub/templates/inventory/create_device.html b/ereuse_devicehub/templates/inventory/create_device.html
index 8dbd300f..9f21c68a 100644
--- a/ereuse_devicehub/templates/inventory/create_device.html
+++ b/ereuse_devicehub/templates/inventory/create_device.html
@@ -53,30 +53,65 @@
                         </optgroup>
                       </select>
                       <small class="text-muted form-text">Type of devices</small>
+                      {% if form.type.errors %}
+                      <p class="text-danger">
+                        {% for error in form.type.errors %}
+                          {{ error }}<br/>
+                        {% endfor %}
+                      </p>
+                      {% endif %}
                     </div>
 
                     <div class="form-group mb-2">
                       <label for="label" class="form-label">Label</label>
                       {{ form.label(class_="form-control") }}
                       <small class="text-muted form-text">Label that you want link to this device</small>
+                      {% if form.label.errors %}
+                      <p class="text-danger">
+                        {% for error in form.label.errors %}
+                          {{ error }}<br/>
+                        {% endfor %}
+                      </p>
+                      {% endif %}
                     </div>
 
                     <div class="from-group has-validation mb-2">
                       <label for="serialNumber" class="form-label">{{ form.serial_number.label }} *</label>
                       {{ form.serial_number(class_="form-control") }}
                       <small class="text-muted form-text">Serial number of this device</small>
+                      {% if form.serial_number.errors %}
+                      <p class="text-danger">
+                        {% for error in form.serial_number.errors %}
+                          {{ error }}<br/>
+                        {% endfor %}
+                      </p>
+                      {% endif %}
                     </div>
 
                     <div class="from-group has-validation mb-2">
                       <label for="model" class="form-label">{{ form.model.label }} *</label>
                       {{ form.model(class_="form-control") }}
                       <small class="text-muted form-text">Name of model</small>
+                      {% if form.model.errors %}
+                      <p class="text-danger">
+                        {% for error in form.model.errors %}
+                          {{ error }}<br/>
+                        {% endfor %}
+                      </p>
+                      {% endif %}
                     </div>
 
                     <div class="from-group has-validation mb-2">
                       <label for="model" class="form-label">{{ form.manufacturer.label }} *</label>
                       {{ form.manufacturer(class_="form-control") }}
                       <small class="text-muted form-text">Name of manufacturer</small>
+                      {% if form.manufacturer.errors %}
+                      <p class="text-danger">
+                        {% for error in form.manufacturer.errors %}
+                          {{ error }}<br/>
+                        {% endfor %}
+                      </p>
+                      {% endif %}
                     </div>
 
                     <div class="from-group has-validation mb-2">
@@ -106,6 +141,13 @@
                         <label class="form-check-label">E. It is unacceptable (substantial visual damage that may affect use)</label>
                       </div>
                       <small class="text-muted form-text">Rate the imperfections that affect the device aesthetically, but not its use.</small>
+                      {% if form.appearance.errors %}
+                      <p class="text-danger">
+                        {% for error in form.appearance.errors %}
+                          {{ error }}<br/>
+                        {% endfor %}
+                      </p>
+                      {% endif %}
                     </div>
 
                     <div class="from-group has-validation mb-2">
@@ -127,90 +169,195 @@
                         <label class="form-check-label">D. Multiple buttons do not work properly; the screen has severe damage that may affect use</label>
                       </div>
                       <small class="text-muted form-text">It qualifies the defects of a device that affect its use.</small>
+                      {% if form.functionality.errors %}
+                      <p class="text-danger">
+                        {% for error in form.functionality.errors %}
+                          {{ error }}<br/>
+                        {% endfor %}
+                      </p>
+                      {% endif %}
                     </div>
 
                     <div class="from-group has-validation mb-2">
                       <label for="model" class="form-label">{{ form.brand.label }}</label>
                       {{ form.brand(class_="form-control") }}
                       <small class="text-muted form-text">A naming for consumers. This field can represent several models, so it can be ambiguous, and it is not used to identify the product.</small>
+                      {% if form.brand.errors %}
+                      <p class="text-danger">
+                        {% for error in form.brand.errors %}
+                          {{ error }}<br/>
+                        {% endfor %}
+                      </p>
+                      {% endif %}
                     </div>
 
                     <div class="from-group has-validation mb-2">
-                      <label for="model" class="form-label">{{ form.generation.label }}</label>
+                      <label for="model" class="form-label">{{ form.generation.label }} *</label>
                       {{ form.generation(class_="form-control") }}
                       <small class="text-muted form-text">The generation of the device.</small>
+                      {% if form.generation.errors %}
+                      <p class="text-danger">
+                        {% for error in form.generation.errors %}
+                          {{ error }}<br/>
+                        {% endfor %}
+                      </p>
+                      {% endif %}
                     </div>
 
                     <div class="from-group has-validation mb-2">
                       <label for="model" class="form-label">{{ form.version.label }}</label>
                       {{ form.version(class_="form-control") }}
                       <small class="text-muted form-text">The version code o fthis device, like 'v1' or 'A001'.</small>
+                      {% if form.version.errors %}
+                      <p class="text-danger">
+                        {% for error in form.version.errors %}
+                          {{ error }}<br/>
+                        {% endfor %}
+                      </p>
+                      {% endif %}
                     </div>
 
                     <div class="from-group has-validation mb-2">
-                      <label for="model" class="form-label">{{ form.weight.label }}</label>
+                      <label for="model" class="form-label">{{ form.weight.label }} *</label>
                       {{ form.weight(class_="form-control") }}
                       <small class="text-muted form-text">The weight of the device in Kg.</small>
+                      {% if form.weight.errors %}
+                      <p class="text-danger">
+                        {% for error in form.weight.errors %}
+                          {{ error }}<br/>
+                        {% endfor %}
+                      </p>
+                      {% endif %}
                     </div>
 
                     <div class="from-group has-validation mb-2">
-                      <label for="model" class="form-label">{{ form.width.label }}</label>
+                      <label for="model" class="form-label">{{ form.width.label }} *</label>
                       {{ form.width(class_="form-control") }}
                       <small class="text-muted form-text">The width of the device in meters.</small>
+                      {% if form.width.errors %}
+                      <p class="text-danger">
+                        {% for error in form.width.errors %}
+                          {{ error }}<br/>
+                        {% endfor %}
+                      </p>
+                      {% endif %}
                     </div>
 
                     <div class="from-group has-validation mb-2">
-                      <label for="model" class="form-label">{{ form.height.label }}</label>
+                      <label for="model" class="form-label">{{ form.height.label }} *</label>
                       {{ form.height(class_="form-control") }}
                       <small class="text-muted form-text">The height of the device in meters.</small>
+                      {% if form.height.errors %}
+                      <p class="text-danger">
+                        {% for error in form.height.errors %}
+                          {{ error }}<br/>
+                        {% endfor %}
+                      </p>
+                      {% endif %}
                     </div>
 
                     <div class="from-group has-validation mb-2">
-                      <label for="model" class="form-label">{{ form.depth.label }}</label>
+                      <label for="model" class="form-label">{{ form.depth.label }} *</label>
                       {{ form.depth(class_="form-control") }}
                       <small class="text-muted form-text">The depth of the device in meters.</small>
+                      {% if form.depth.errors %}
+                      <p class="text-danger">
+                        {% for error in form.depth.errors %}
+                          {{ error }}<br/>
+                        {% endfor %}
+                      </p>
+                      {% endif %}
                     </div>
 
                     <div class="from-group has-validation mb-2">
                       <label for="model" class="form-label">{{ form.variant.label }}</label>
                       {{ form.variant(class_="form-control") }}
                       <small class="text-muted form-text">A variant or sub-model of the device.</small>
+                      {% if form.variant.errors %}
+                      <p class="text-danger">
+                        {% for error in form.variant.errors %}
+                          {{ error }}<br/>
+                        {% endfor %}
+                      </p>
+                      {% endif %}
                     </div>
 
                     <div class="from-group has-validation mb-2">
                       <label for="model" class="form-label">{{ form.sku.label }}</label>
                       {{ form.sku(class_="form-control") }}
                       <small class="text-muted form-text">The Stock Keeping Unit (SKU), i.e. a merchant-specific identifier for a product or service.</small>
+                      {% if form.sku.errors %}
+                      <p class="text-danger">
+                        {% for error in form.sku.errors %}
+                          {{ error }}<br/>
+                        {% endfor %}
+                      </p>
+                      {% endif %}
                     </div>
 
                     <div class="from-group has-validation mb-2">
                       <label for="image" class="form-label">{{ form.image.label }}</label>
                       {{ form.image(class_="form-control") }}
                       <small class="text-muted form-text">An URL containing an image of the device.</small>
+                      {% if form.image.errors %}
+                      <p class="text-danger">
+                        {% for error in form.image.errors %}
+                          {{ error }}<br/>
+                        {% endfor %}
+                      </p>
+                      {% endif %}
                     </div>
 
                     <div id="imei" class="from-group has-validation mb-2">
                       <label for="imei" class="form-label">{{ form.imei.label }}</label>
                       {{ form.imei(class_="form-control") }}
                       <small class="text-muted form-text">A number from 14 to 16 digits.</small>
+                      {% if form.imei.errors %}
+                      <p class="text-danger">
+                        {% for error in form.imei.errors %}
+                          {{ error }}<br/>
+                        {% endfor %}
+                      </p>
+                      {% endif %}
                     </div>
 
                     <div id="meid" class="from-group has-validation mb-2">
                       <label for="meid" class="form-label">{{ form.meid.label }}</label>
                       {{ form.meid(class_="form-control") }}
                       <small class="text-muted form-text">14 hexadecimal digits.</small>
+                      {% if form.meid.errors %}
+                      <p class="text-danger">
+                        {% for error in form.meid.errors %}
+                          {{ error }}<br/>
+                        {% endfor %}
+                      </p>
+                      {% endif %}
                     </div>
 
                     <div id="resolution" class="from-group has-validation mb-2">
                       <label for="resolution" class="form-label">{{ form.resolution.label }}</label>
                       {{ form.resolution(class_="form-control") }}
                       <small class="text-muted form-text">The resolution width of the screen.</small>
+                      {% if form.resolution.errors %}
+                      <p class="text-danger">
+                        {% for error in form.resolution.errors %}
+                          {{ error }}<br/>
+                        {% endfor %}
+                      </p>
+                      {% endif %}
                     </div>
 
                     <div id="screen" class="from-group has-validation mb-2">
                       <label for="screen" class="form-label">{{ form.screen.label }}</label>
                       {{ form.screen(class_="form-control") }}
                       <small class="text-muted form-text">The size of the screen.</small>
+                      {% if form.screen.errors %}
+                      <p class="text-danger">
+                        {% for error in form.screen.errors %}
+                          {{ error }}<br/>
+                        {% endfor %}
+                      </p>
+                      {% endif %}
                     </div>
 
                   </div>