diff --git a/docs/fields/field-types.md b/docs/fields/field-types.md
index b76e288..99c5409 100644
--- a/docs/fields/field-types.md
+++ b/docs/fields/field-types.md
@@ -14,23 +14,19 @@ Each of the `Fields` has assigned both `sqlalchemy` column class and python type
 
 ### String
 
-`String(max_length, 
-        allow_blank: bool = True,
-        strip_whitespace: bool = False,
+`String(max_length: int, 
         min_length: int = None,
-        max_length: int = None,
-        curtail_length: int = None,
         regex: str = None,)` has a required `max_length` parameter.  
 
 * Sqlalchemy column: `sqlalchemy.String`  
 * Type (used for pydantic): `str` 
 
 !!!tip
-    For explanation of other parameters check [pydantic][pydantic] documentation.
+    For explanation of other parameters check [pydantic](https://pydantic-docs.helpmanual.io/usage/schema/#field-customisation) documentation.
 
 ### Text
 
-`Text(allow_blank: bool = True, strip_whitespace: bool = False)` has no required parameters.  
+`Text()` has no required parameters.  
 
 * Sqlalchemy column: `sqlalchemy.Text`  
 * Type (used for pydantic): `str` 
@@ -247,5 +243,5 @@ response = client.post(
 
 [relations]: ../relations/index.md
 [queries]: ../queries.md
-[pydantic]: https://pydantic-docs.helpmanual.io/usage/types/#constrained-types
+[pydantic]: https://pydantic-docs.helpmanual.io/usage/schema/#field-customisation
 [server default]: https://docs.sqlalchemy.org/en/13/core/defaults.html#server-invoked-ddl-explicit-default-expressions
\ No newline at end of file
diff --git a/docs/releases.md b/docs/releases.md
index 48b0a0e..a891e9e 100644
--- a/docs/releases.md
+++ b/docs/releases.md
@@ -1,3 +1,18 @@
+# 0.10.16
+
+## ✨ Features
+
+* Allow passing your own pydantic `Config` to `ormar.Model` that will be merged with the default one by @naturalethic (thanks!) [#285](https://github.com/collerek/ormar/issues/285)
+* Add `SmallInteger` field type by @ProgrammerPlus1998 (thanks!) [#297](https://github.com/collerek/ormar/pull/297)
+
+
+## 🐛 Fixes
+
+* Fix generating openapi schema by removing obsolete pydantic field parameters that were directly exposed in schema [#291](https://github.com/collerek/ormar/issues/291)
+* Fix unnecessary warning for auto generated through models [#295](https://github.com/collerek/ormar/issues/295)
+
+
+
 # 0.10.15
 
 ## 🐛 Fixes
diff --git a/ormar/__init__.py b/ormar/__init__.py
index 1c71fa9..1542801 100644
--- a/ormar/__init__.py
+++ b/ormar/__init__.py
@@ -41,7 +41,6 @@ from ormar.exceptions import (  # noqa: I100
 from ormar.fields import (
     BaseField,
     BigInteger,
-    SmallInteger,
     Boolean,
     DECODERS_MAP,
     Date,
@@ -57,6 +56,7 @@ from ormar.fields import (
     LargeBinary,
     ManyToMany,
     ManyToManyField,
+    SmallInteger,
     String,
     Text,
     Time,
@@ -77,7 +77,7 @@ class UndefinedType:  # pragma no cover
 
 Undefined = UndefinedType()
 
-__version__ = "0.10.15"
+__version__ = "0.10.16"
 __all__ = [
     "Integer",
     "BigInteger",
diff --git a/ormar/fields/__init__.py b/ormar/fields/__init__.py
index 9745b1b..a879735 100644
--- a/ormar/fields/__init__.py
+++ b/ormar/fields/__init__.py
@@ -9,7 +9,6 @@ from ormar.fields.foreign_key import ForeignKey, ForeignKeyField, UniqueColumns
 from ormar.fields.many_to_many import ManyToMany, ManyToManyField
 from ormar.fields.model_fields import (
     BigInteger,
-    SmallInteger,
     Boolean,
     Date,
     DateTime,
@@ -18,6 +17,7 @@ from ormar.fields.model_fields import (
     Integer,
     JSON,
     LargeBinary,
+    SmallInteger,
     String,
     Text,
     Time,
diff --git a/ormar/fields/model_fields.py b/ormar/fields/model_fields.py
index a53ac0e..f1230b5 100644
--- a/ormar/fields/model_fields.py
+++ b/ormar/fields/model_fields.py
@@ -142,10 +142,7 @@ class String(ModelFieldFactory, str):
         cls,
         *,
         max_length: int,
-        allow_blank: bool = True,
-        strip_whitespace: bool = False,
         min_length: int = None,
-        curtail_length: int = None,
         regex: str = None,
         **kwargs: Any
     ) -> BaseField:  # type: ignore
@@ -157,7 +154,6 @@ class String(ModelFieldFactory, str):
                 if k not in ["cls", "__class__", "kwargs"]
             },
         }
-        kwargs["allow_blank"] = kwargs.get("nullable", True)
         return super().__new__(cls, **kwargs)
 
     @classmethod
@@ -244,7 +240,7 @@ class Text(ModelFieldFactory, str):
     _sample = "text"
 
     def __new__(  # type: ignore
-        cls, *, allow_blank: bool = True, strip_whitespace: bool = False, **kwargs: Any
+        cls, **kwargs: Any
     ) -> BaseField:
         kwargs = {
             **kwargs,
@@ -254,7 +250,6 @@ class Text(ModelFieldFactory, str):
                 if k not in ["cls", "__class__", "kwargs"]
             },
         }
-        kwargs["allow_blank"] = kwargs.get("nullable", True)
         return super().__new__(cls, **kwargs)
 
     @classmethod
diff --git a/ormar/models/helpers/__init__.py b/ormar/models/helpers/__init__.py
index 146aab4..0d9e6ce 100644
--- a/ormar/models/helpers/__init__.py
+++ b/ormar/models/helpers/__init__.py
@@ -8,6 +8,7 @@ from ormar.models.helpers.pydantic import (
     get_potential_fields,
     get_pydantic_base_orm_config,
     get_pydantic_field,
+    merge_or_generate_pydantic_config,
     remove_excluded_parent_fields,
 )
 from ormar.models.helpers.relations import (
@@ -33,6 +34,7 @@ __all__ = [
     "get_pydantic_field",
     "get_potential_fields",
     "get_pydantic_base_orm_config",
+    "merge_or_generate_pydantic_config",
     "check_required_meta_parameters",
     "sqlalchemy_columns_from_model_fields",
     "populate_choices_validators",
diff --git a/ormar/models/helpers/pydantic.py b/ormar/models/helpers/pydantic.py
index 0830dab..87ed5d1 100644
--- a/ormar/models/helpers/pydantic.py
+++ b/ormar/models/helpers/pydantic.py
@@ -1,3 +1,4 @@
+import inspect
 from typing import Dict, Optional, TYPE_CHECKING, Tuple, Type
 
 import pydantic
@@ -5,6 +6,7 @@ from pydantic.fields import ModelField
 from pydantic.utils import lenient_issubclass
 
 from ormar.fields import BaseField  # noqa: I100, I202
+from ormar.exceptions import ModelDefinitionError
 
 if TYPE_CHECKING:  # pragma no cover
     from ormar import Model
@@ -88,6 +90,31 @@ def populate_pydantic_default_values(attrs: Dict) -> Tuple[Dict, Dict]:
     return attrs, model_fields
 
 
+def merge_or_generate_pydantic_config(attrs: Dict, name: str) -> None:
+    """
+    Checks if the user provided pydantic Config,
+    and if he did merges it with the default one.
+
+    Updates the attrs in place with a new config.
+
+    :rtype: None
+    """
+    DefaultConfig = get_pydantic_base_orm_config()
+    if "Config" in attrs:
+        ProvidedConfig = attrs["Config"]
+        if not inspect.isclass(ProvidedConfig):
+            raise ModelDefinitionError(
+                f"Config provided for class {name} has to be a class."
+            )
+
+        class Config(ProvidedConfig, DefaultConfig):  # type: ignore
+            pass
+
+        attrs["Config"] = Config
+    else:
+        attrs["Config"] = DefaultConfig
+
+
 def get_pydantic_base_orm_config() -> Type[pydantic.BaseConfig]:
     """
     Returns empty pydantic Config with orm_mode set to True.
diff --git a/ormar/models/metaclass.py b/ormar/models/metaclass.py
index df15cac..5a40c0c 100644
--- a/ormar/models/metaclass.py
+++ b/ormar/models/metaclass.py
@@ -1,4 +1,3 @@
-import inspect
 from typing import (
     Any,
     Dict,
@@ -37,8 +36,8 @@ from ormar.models.helpers import (
     expand_reverse_relationships,
     extract_annotations_and_default_vals,
     get_potential_fields,
-    get_pydantic_base_orm_config,
     get_pydantic_field,
+    merge_or_generate_pydantic_config,
     meta_field_not_set,
     populate_choices_validators,
     populate_default_options_values,
@@ -553,21 +552,7 @@ class ModelMetaclass(pydantic.main.ModelMetaclass):
         :param attrs: class namespace
         :type attrs: Dict
         """
-        DefaultConfig = get_pydantic_base_orm_config()
-        if "Config" in attrs:
-            ProvidedConfig = attrs["Config"]
-            if not inspect.isclass(ProvidedConfig):
-                raise ModelDefinitionError(
-                    f"Config provided for class {name} has to be a class."
-                )
-
-            class Config(ProvidedConfig, DefaultConfig):  # type: ignore
-                pass
-
-            attrs["Config"] = Config
-        else:
-            attrs["Config"] = DefaultConfig
-
+        merge_or_generate_pydantic_config(attrs=attrs, name=name)
         attrs["__name__"] = name
         attrs, model_fields = extract_annotations_and_default_vals(attrs)
         for base in reversed(bases):
diff --git a/tests/test_fastapi/test_schema_not_allowed_params.py b/tests/test_fastapi/test_schema_not_allowed_params.py
new file mode 100644
index 0000000..bc24a08
--- /dev/null
+++ b/tests/test_fastapi/test_schema_not_allowed_params.py
@@ -0,0 +1,29 @@
+import databases
+import sqlalchemy
+
+import ormar
+
+DATABASE_URL = "sqlite:///db.sqlite"
+database = databases.Database(DATABASE_URL)
+metadata = sqlalchemy.MetaData()
+
+
+class BaseMeta(ormar.ModelMeta):
+    metadata = metadata
+    database = database
+
+
+class Author(ormar.Model):
+    class Meta(BaseMeta):
+        tablename = "authors"
+
+    id: int = ormar.Integer(primary_key=True)
+    name: str = ormar.String(max_length=100)
+    contents: str = ormar.Text()
+
+
+def test_schema_not_allowed():
+    schema = Author.schema()
+    for field_schema in schema.get("properties").values():
+        for key in field_schema.keys():
+            assert "_" not in key, f"Found illegal field in openapi schema: {key}"
diff --git a/tests/test_model_definition/test_models.py b/tests/test_model_definition/test_models.py
index aaea566..71d12aa 100644
--- a/tests/test_model_definition/test_models.py
+++ b/tests/test_model_definition/test_models.py
@@ -595,3 +595,9 @@ async def test_get_and_first():
 
             user = await User2.objects.first()
             assert user.name == "Jane"
+
+
+def test_constraints():
+    with pytest.raises(pydantic.ValidationError) as e:
+        Product(name="T-Shirt", rating=50, in_stock=True)
+    assert "ensure this value is less than or equal to 5" in str(e.value)