Question

我希望有人可以就此提出建议：尽管数据正确，但我的序列化程序返回一个空字符串。

#!/usr/bin/perl

print "Content-type: text/html\n\n";

use CGI qw(:standard);

local ( $buffer, @pairs, $pair, $name, $value, %FORM );

# Read in text
$ENV{'REQUEST_METHOD'} =~ tr/a-z/A-Z/;
if ( $ENV{'REQUEST_METHOD'} eq "POST" ) {
    read( STDIN, $buffer, $ENV{'CONTENT_LENGTH'} );
}
else {
    $buffer = $ENV{'QUERY_STRING'};
}

# Split information into name/value pairs
@pairs = split( /&/, $buffer );
foreach $pair ( @pairs ) {
    ( $name, $value ) = split( /=/, $pair );
    $value =~ tr/+/ /;
    $value =~ s/%(..)/pack("C", hex($1))/eg;
    $FORM{$name} = $value;
}

#variables for input text fields
$Item     = $FORM{Item};
$Name     = $FORM{Name};
$Cost     = $FORM{Cost};
$Price    = $FORM{Price};
$Quantity = $FORM{Quantity};

#Radio button
$letter = $FORM{letter};

#Validate data is entered in first 2 input boxes
if ( $Item eq "" ) {
    print "$Item Field Cannot be Blank";
}

if ( $Name eq "" ) {
    print "$Name Field cannot be Blank";
}

#Validate the correct amount is entered
if ( $Cost >= .50 && $Cost <= 1000 ) {
    print "$Cost Cost must be between $.50 and $1000";
}

if ( $Price >= 1.00 && $Cost <= 2000 ) {
    print "$Price Price must be between $1.00 and $2000";
}

#Validate Category is Chosen

#Validate Quantity on hand not less than 0
if ( $Quantity < 0 ) {
    print "$Quantity Quantity on-hand cannot be less than 0";
}

MySerializer：

def foo(self, request, uuid=None):
        data = JSONParser().parse(request)
        logger.error(data)
        serializer = MySerializer(data=data)
        logger.error(serializer.data) #Empty JSON string 
        something.bar(serializer.data, self.request.user)
        return Response(status=status.HTTP_201_CREATED)

序列化程序从serializer.data返回的数据： foo1：''，foo2：False，foo3：False

我哪里错了？

Answer 1

我相信您的答案直接来自rest_framework/serializers.py：

@property
def data(self):
    if hasattr(self, 'initial_data') and not hasattr(self, '_validated_data'):
        msg = (
            'When a serializer is passed a `data` keyword argument you '
            'must call `.is_valid()` before attempting to access the '
            'serialized `.data` representation.\n'
            'You should either call `.is_valid()` first, '
            'or access `.initial_data` instead.'
        )
        raise AssertionError(msg)

Answer 2

您需要首先使用数据在序列化程序上调用.is_valid()，然后访问序列化数据（Joey也指出）。

def foo(self, request, uuid=None):
    data = JSONParser().parse(request)
    logger.error(data)
    serializer = MySerializer(data=data)
    serializer.is_valid(raise_exception=True) # explicitly call .is_valid() first 
    logger.error(serializer.data) #Empty JSON string  
    something.bar(serializer.data, self.request.user)
    return Response(status=status.HTTP_201_CREATED)

Django序列化器返回空字符串

2 个答案: