next part of the docs and api documentation in beta ver

docs/api/models/helpers/models.md

@@ -0,0 +1,64 @@
+<a name="models.helpers.models"></a>
+# models.helpers.models
+
+<a name="models.helpers.models.populate_default_options_values"></a>
+#### populate\_default\_options\_values
+
+```python
+populate_default_options_values(new_model: Type["Model"], model_fields: Dict) -> None
+```
+
+Sets all optional Meta values to it's defaults
+and set model_fields that were already previously extracted.
+
+Here should live all options that are not overwritten/set for all models.
+
+Current options are:
+* constraints = []
+* abstract = False
+
+**Arguments**:
+
+- `new_model (Model class)`: newly constructed Model
+- `model_fields (Union[Dict[str, type], Dict])`: 
+
+<a name="models.helpers.models.extract_annotations_and_default_vals"></a>
+#### extract\_annotations\_and\_default\_vals
+
+```python
+extract_annotations_and_default_vals(attrs: Dict) -> Tuple[Dict, Dict]
+```
+
+Extracts annotations from class namespace dict and triggers
+extraction of ormar model_fields.
+
+**Arguments**:
+
+- `attrs (Dict)`: namespace of the class created
+
+**Returns**:
+
+`(Tuple[Dict, Dict])`: namespace of the class updated, dict of extracted model_fields
+
+<a name="models.helpers.models.validate_related_names_in_relations"></a>
+#### validate\_related\_names\_in\_relations
+
+```python
+validate_related_names_in_relations(model_fields: Dict, new_model: Type["Model"]) -> None
+```
+
+Performs a validation of relation_names in relation fields.
+If multiple fields are leading to the same related model
+only one can have empty related_name param
+(populated by default as model.name.lower()+'s').
+Also related_names have to be unique for given related model.
+
+**Raises**:
+
+- `ModelDefinitionError`: if validation of related_names fail
+
+**Arguments**:
+
+- `model_fields (Dict[str, ormar.Field])`: dictionary of declared ormar model fields
+- `new_model (Model class)`: 
+