U
    d}                     @   s   d Z ddlmZmZ eddddddd	gZed
ddddddgZdd Zdd Zdd Zdd Z	dd Z
dd Zdd Zdd  Zd!d" Zd#S )$z
Helper function for returning the field information that is associated
with a model class. This includes returning all the forward and reverse
relationships and their associated metadata.

Usage: `get_field_info(model)` returns a `FieldInfo` instance.
    )OrderedDict
namedtupleZFieldResultpkfieldsforward_relationsreverse_relationsfields_and_pkZ	relationsRelationInfomodel_fieldrelated_modelto_manyto_fieldhas_through_modelreversec                 C   sP   | j jj }t|}t|}t|}t|}t||}t||}t||||||S )z
    Given a model class, returns a `FieldInfo` instance, which is a
    `namedtuple`, containing metadata about the various field types on the model
    including information about their relationships.
    )	_metaZconcrete_model_get_pk_get_fields_get_forward_relationships_get_reverse_relationships_merge_fields_and_pk_merge_relationships	FieldInfo)modeloptsr   r   r   r   r   Zrelationships r   C/tmp/pip-unpacked-wheel-quko9yh2/rest_framework/utils/model_meta.pyget_field_info   s    



 r   c                 C   s.   | j }|j}|r*|jr*|jjjj }|j}q|S N)r   remote_fieldZparent_linkr   r   )r   r   relr   r   r   r   0   s    
r   c                 C   s*   t  }dd | jD D ]}|||j< q|S )Nc                 S   s   g | ]}|j r|js|qS r   	serializer   .0fieldr   r   r   
<listcomp>>   s       z_get_fields.<locals>.<listcomp>)r   r   name)r   r   r$   r   r   r   r   <   s    r   c                 C   s   t | dd o| jd S )N	to_fieldsr   )getattrr'   )r$   r   r   r   _get_to_fieldD   s    r)   c              	   C   s   t  }dd | jD D ]&}t||jjdt|ddd||j< qdd | jD D ],}t||jjdd|jjj	j
 dd||j< qN|S )D
    Returns an `OrderedDict` of field names to `RelationInfo`.
    c                 S   s   g | ]}|j r|jr|qS r   r    r"   r   r   r   r%   M   s       z._get_forward_relationships.<locals>.<listcomp>Fr
   r   r   r   r   r   c                 S   s   g | ]}|j r|qS r   )r!   r"   r   r   r   r%   X   s      TN)r   r   r	   r   r   r)   r&   many_to_manythroughr   auto_created)r   r   r$   r   r   r   r   H   s(    
r   c              
   C   s   t  }dd | jD }|D ]2}| }td|j|jjjt|jddd||< qdd | jD }|D ]F}| }td|jddt	|jjdddk	o|jjj
jj dd||< qb|S )	r*   c                 S   s   g | ]}|j js|qS r   r$   r,   r#   rr   r   r   r%   m   s      z._get_reverse_relationships.<locals>.<listcomp>NFTr+   c                 S   s   g | ]}|j jr|qS r   r/   r0   r   r   r   r%   z   s      r-   )r   Zrelated_objectsZget_accessor_namer	   r   r$   r   multipler)   r(   r-   r   r.   )r   r   Zall_related_objectsZrelationZaccessor_nameZ all_related_many_to_many_objectsr   r   r   r   h   s2    
r   c                 C   s&   t  }| |d< | || j< || |S )Nr   )r   r&   update)r   r   r   r   r   r   r      s
    

r   c                 C   s   t t|  t|  S r   )r   listitems)r   r   r   r   r   r      s
    

r   c                 C   s   t | dot | jdo| jjS )z_
    Given a model class, returns a boolean True if it is abstract and False if it is not.
    r   abstract)hasattrr   r6   )r   r   r   r   is_abstract_model   s    r8   N)__doc__collectionsr   r   r   r	   r   r   r   r)   r   r   r   r   r8   r   r   r   r   <module>   s4   	
 %	