o
    h-                     @   s   d Z ddlmZ ddlmZmZmZmZ ddlm	Z	 ddl
mZmZ g dZG dd deZG d	d
 d
eeeZG dd deZG dd deZG dd deZG dd deeZG dd deeZG dd deeZdS )z>
Classes to represent the definitions of aggregate functions.
    )
FieldError)CaseFuncStarWhen)IntegerField)FixDurationInputMixinNumericOutputFieldMixin)	AggregateAvgCountMaxMinStdDevSumVariancec                       s   e Zd ZdZdZdZdZdZdZddd fdd
Z	 fd	d
Z
 fddZ fddZd fdd	Zedd ZdddZ fddZ fddZ  ZS )r
   z)%(function)s(%(distinct)s%(expressions)s)TNz%s FILTER (WHERE %%(filter)s)F)distinctfilterc                   s<   |r| j std| jj || _|| _t j|i | d S )Nz%s does not allow distinct.)allow_distinct	TypeError	__class____name__r   r   super__init__)selfr   r   expressionsextrar    c/var/www/html/magazine_api/magazine_env/lib/python3.10/site-packages/django/db/models/aggregates.pyr      s
   
zAggregate.__init__c                    s   dd t   D S )Nc                 S   s   g | ]}|j qS r   )Z_output_field_or_none).0er   r   r   
<listcomp>!   s    z/Aggregate.get_source_fields.<locals>.<listcomp>)r   get_source_expressionsr   r   r   r   get_source_fields   s   zAggregate.get_source_fieldsc                    s    t   }| jr|| jg S |S N)r   r#   r   )r   source_expressionsr   r   r   r#   #   s   
z Aggregate.get_source_expressionsc                    s   | j o| | _ t |S r&   )r   popr   set_source_expressions)r   Zexprsr   r   r   r)   )   s   z Aggregate.set_source_expressionsc                    s   t  ||||}|jo|j|||||_|sGt t| }t|D ]#\}}	|	jrF|  | }
t|
dr8|
jnt	|
}t
d|j||f q#|S )Nnamez-Cannot compute %s('%s'): '%s' is an aggregate)r   resolve_expressionr   r
   r#   	enumeratecontains_aggregatehasattrr*   reprr   )r   queryZallow_joinsZreuseZ	summarizeZfor_savecr   indexexprZbefore_resolvedr*   r   r   r   r+   -   s   zAggregate.resolve_expressionc                 C   sB   |   }t|dkrt|d drd|d j| j f S td)N   r   r*   z%s__%sz$Complex expressions require an alias)r#   lenr.   r*   lowerr   )r   r   r   r   r   default_alias<   s   zAggregate.default_aliasc                 C   s   g S r&   r   )r   aliasr   r   r   get_group_by_colsC   s   zAggregate.get_group_by_colsc                    s   | j rdnd|d< | jrh|jjr9| j||\}}| j|d| j }t j||f||d|\}}||| fS | 	 }	d |	_|	
 }
t| j|
d d}|	t|g|
dd    tt|	j||fi |S t j||fi |S )	Nz	DISTINCT  r   template)r;   r   r   )Zthenr4   )r   r   featuresZ supports_aggregate_filter_clauseas_sqlfilter_templategetr;   r   copyr#   r   r)   r   r
   )r   compiler
connectionZextra_contextZ
filter_sqlZfilter_paramsr;   sqlparamsr@   r'   	conditionr   r   r   r=   F   s(   
zAggregate.as_sqlc                    s.   t   }| jr| j|d< | jr| j|d< |S )Nr   r   )r   _get_repr_optionsr   r   )r   optionsr   r   r   rF   Z   s   


zAggregate._get_repr_options)NTNFFr&   )r   
__module____qualname__r;   r-   r*   r>   Zwindow_compatibler   r   r%   r#   r)   r+   propertyr7   r9   r=   rF   __classcell__r   r   r   r   r
      s"    

r
   c                   @      e Zd ZdZd ZdZdS )r   ZAVGTNr   rH   rI   functionr*   r   r   r   r   r   r   c       r   c                       s8   e Zd ZdZd Ze ZdZd fdd	Zdd Z	  Z
S )	r   ZCOUNTTNc                    sD   |dkrt  }t|t r|d urtdt j|fd|i| d S )N*z8Star cannot be used with filter. Please specify a field.r   )r   
isinstance
ValueErrorr   r   )r   
expressionr   r   r   r   r   r   o   s
   zCount.__init__c                 C   s   |d u rdS |S )Nr   r   )r   valuerS   rB   r   r   r   convert_valuev   s   zCount.convert_valuer&   )r   rH   rI   rN   r*   r   Zoutput_fieldr   r   rU   rK   r   r   r   r   r   i   s    r   c                   @      e Zd ZdZd ZdS )r   MAXNr   rH   rI   rN   r*   r   r   r   r   r   z       r   c                   @   rV   )r   ZMINNrX   r   r   r   r   r      rY   r   c                       .   e Zd Zd Zd fdd	Z fddZ  ZS )r   Fc                    &   |rdnd| _ t j|fi | d S )NSTDDEV_SAMPZ
STDDEV_POPrN   r   r   r   rS   sampler   r   r   r   r         zStdDev.__init__c                       i t   d| jdkiS )Nr_   r\   r   rF   rN   r$   r   r   r   rF         zStdDev._get_repr_optionsFr   rH   rI   r*   r   rF   rK   r   r   r   r   r          r   c                   @   rL   )r   ZSUMTNrM   r   r   r   r   r      rO   r   c                       rZ   )r   Fc                    r[   )NVAR_SAMPZVAR_POPr]   r^   r   r   r   r      r`   zVariance.__init__c                    ra   )Nr_   rg   rb   r$   r   r   r   rF      rc   zVariance._get_repr_optionsrd   re   r   r   r   r   r      rf   r   N)__doc__Zdjango.core.exceptionsr   Zdjango.db.models.expressionsr   r   r   r   Zdjango.db.models.fieldsr   Z!django.db.models.functions.mixinsr   r	   __all__r
   r   r   r   r   r   r   r   r   r   r   r   <module>   s    S