我有三个模型类，如下所示：
class Model(models.Model):
model = models.CharField(max_length=20, blank=False)
manufacturer = models.ForeignKey(Manufacturer)
date_added = models.DateField(default=datetime.today)
def __unicode__(self):
name = ''+str(self.manufacturer)+" "+str(self.model)
return name
class Series(models.Model):
series = models.CharField(max_length=20, blank=True, null=True)
model = models.ForeignKey(Model)
date_added = models.DateField(default=datetime.today)
def __unicode__(self):
name = str(self.model)+" "+str(self.series)
return name
class Manufacturer(models.Model):
MANUFACTURER_POPULARITY_CHOICES = (
('1', 'Primary'),
('2', 'Secondary'),
('3', 'Tertiary'),
)
manufacturer = models.CharField(max_length=15, blank=False)
date_added = models.DateField(default=datetime.today)
manufacturer_popularity = models.CharField(max_length=1,
choices=MANUFACTURER_POPULARITY_CHOICES)
def __unicode__(self):
return self.manufacturer
我希望将model series和manufacturer的字段表示为下拉菜单而不是文本字段。我已经自定义了模型表格如下：
class SeriesForm(ModelForm):
series = forms.ModelChoiceField(queryset=Series.objects.all())
class Meta:
model = Series
exclude = ('model', 'date_added',)
class ModelForm(ModelForm):
model = forms.ModelChoiceField(queryset=Model.objects.all())
class Meta:
model = Model
exclude = ('manufacturer', 'date_added',)
class ManufacturerForm(ModelForm):
manufacturer = forms.ModelChoiceField(queryset=Manufacturer.objects.all())
class Meta:
model = Manufacturer
exclude = ('date_added',)
但是，下拉列表中填写了相应类中的unicode ...如何进一步自定义此项以获得我想要的最终结果？
另外，如何使用正确的数据填充表单进行编辑？目前仅填充SeriesForm。所有这一切的起点来自另一个类，其声明如下：
class CommonVehicle(models.Model):
year = models.ForeignKey(Year)
series = models.ForeignKey(Series)
....
def __unicode__(self):
name = ''+str(self.year)+" "+str(self.series)
return name
答案 0 :(得分：2)
查看http://docs.djangoproject.com/en/dev/ref/forms/fields/#modelchoicefield，特别是开始的块
将调用模型的 unicode 方法，以生成对象的字符串表示形式，以便在字段的选择中使用;提供自定义表示，子类ModelChoiceField和覆盖label_from_instance。此方法将接收模型对象，并应返回适合表示它的字符串。
[然后是如何做到这一点的一个很好的例子]
HTH
史蒂夫
答案 1 :(得分：-3)
.h文件:( UIView创建）
#import <UIKit/UIKit.h>
@class NIDropDown;
@protocol NIDropDownDelegate
- (void) niDropDownDelegateMethod: (NIDropDown *) sender;
@end
@interface NIDropDown : UIView <UITableViewDelegate, UITableViewDataSource>
{
NSString *animationDirection;
UIImageView *imgView;
}
@property (nonatomic, retain) id <NIDropDownDelegate> delegate;
@property (nonatomic, retain) NSString *animationDirection;
-(void)hideDropDown:(UIButton *)b;
- (id)showDropDown:(UIButton *)b :(CGFloat *)height :(NSArray *)arr :(NSArray *)imgArr :(NSString *)direction;
@end
.m文件：
#import "NIDropDown.h"
#import "QuartzCore/QuartzCore.h"
@interface NIDropDown ()
@property(nonatomic, strong) UITableView *table;
@property(nonatomic, strong) UIButton *btnSender;
@property(nonatomic, retain) NSArray *list;
@property(nonatomic, retain) NSArray *imageList;
@end
@implementation NIDropDown
@synthesize table;
@synthesize btnSender;
@synthesize list;
@synthesize imageList;
@synthesize delegate;
@synthesize animationDirection;
- (id)showDropDown:(UIButton *)b :(CGFloat *)height :(NSArray *)arr :(NSArray *)imgArr :(NSString *)direction {
btnSender = b;
animationDirection = direction;
self.table = (UITableView *)[super init];
if (self) {
// Initialization code
CGRect btn = b.frame;
self.list = [NSArray arrayWithArray:arr];
self.imageList = [NSArray arrayWithArray:imgArr];
if ([direction isEqualToString:@"up"]) {
self.frame = CGRectMake(btn.origin.x, btn.origin.y, btn.size.width, 0);
self.layer.shadowOffset = CGSizeMake(-5, -5);
}else if ([direction isEqualToString:@"down"]) {
self.frame = CGRectMake(btn.origin.x, btn.origin.y+btn.size.height, btn.size.width, 0);
self.layer.shadowOffset = CGSizeMake(-5, 5);
}
self.layer.masksToBounds = NO;
self.layer.cornerRadius = 8;
self.layer.shadowRadius = 5;
self.layer.shadowOpacity = 0.5;
table = [[UITableView alloc] initWithFrame:CGRectMake(0, 0, btn.size.width, 0)];
table.delegate = self;
table.dataSource = self;
table.layer.cornerRadius = 5;
//table.backgroundColor = [UIColor clearColor];
table.backgroundColor = [UIColor scrollViewTexturedBackgroundColor];//[UIColor colorWithRed:0.239 green:0.239 blue:0.239 alpha:1];
table.separatorStyle = UITableViewCellSeparatorStyleNone;
table.separatorColor = [UIColor clearColor];
[UIView beginAnimations:nil context:nil];
[UIView setAnimationDuration:0.5];
if ([direction isEqualToString:@"up"]) {
self.frame = CGRectMake(btn.origin.x, btn.origin.y-*height, btn.size.width, *height);
} else if([direction isEqualToString:@"down"]) {
self.frame = CGRectMake(btn.origin.x, btn.origin.y+btn.size.height, btn.size.width, *height);
}
table.frame = CGRectMake(0, 0, btn.size.width, *height);
[UIView commitAnimations];
[b.superview addSubview:self];
[self addSubview:table];
}
return self;
}
-(void)hideDropDown:(UIButton *)b {
CGRect btn = b.frame;
[UIView beginAnimations:nil context:nil];
[UIView setAnimationDuration:0.5];
if ([animationDirection isEqualToString:@"up"]) {
self.frame = CGRectMake(btn.origin.x, btn.origin.y, btn.size.width, 0);
}else if ([animationDirection isEqualToString:@"down"]) {
self.frame = CGRectMake(btn.origin.x, btn.origin.y+btn.size.height, btn.size.width, 0);
}
table.frame = CGRectMake(0, 0, btn.size.width, 0);
[UIView commitAnimations];
}
- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView {
return 1;
}
-(CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath {
return 40;
}
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section {
return [self.list count];
}
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
static NSString *CellIdentifier = @"Cell";
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
if (cell == nil) {
cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier];
if(UI_USER_INTERFACE_IDIOM() == UIUserInterfaceIdiomPad){
cell.textLabel.font = [UIFont systemFontOfSize:20];
} else {
cell.textLabel.font = [UIFont systemFontOfSize:8];
}
cell.textLabel.textAlignment = UITextAlignmentCenter;
}
if ([self.imageList count] == [self.list count]) {
//cell.textLabel.text =[list objectAtIndex:indexPath.row];
//cell.imageView.image = [imageList objectAtIndex:indexPath.row];
} else if ([self.imageList count] > [self.list count]) {
// cell.textLabel.text =[list objectAtIndex:indexPath.row];
if (indexPath.row < [imageList count]) {
// cell.imageView.image = [imageList objectAtIndex:indexPath.row];
}
} else if ([self.imageList count] < [self.list count]) {
cell.textLabel.text =[list objectAtIndex:indexPath.row];
if (indexPath.row < [imageList count]) {
//cell.imageView.image = [imageList objectAtIndex:indexPath.row];
}
}
cell.textLabel.textColor = [UIColor blackColor];
UIView * v = [[UIView alloc] init];
v.backgroundColor = [UIColor grayColor];
cell.selectedBackgroundView = v;
return cell;
}
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath {
[self hideDropDown:btnSender];
UITableViewCell *c = [tableView cellForRowAtIndexPath:indexPath];
//[btnSender setTitle:c.textLabel.text forState:UIControlStateNormal];
NSUserDefaults *prefCountOne = [NSUserDefaults standardUserDefaults];
[prefCountOne setObject:c.textLabel.text forKey:@"TYPETEXT"];
for (UIView *subview in btnSender.subviews) {
if ([subview isKindOfClass:[UIImageView class]]) {
[subview removeFromSuperview];
}
}
imgView.image = c.imageView.image;
imgView = [[UIImageView alloc] initWithImage:c.imageView.image];
imgView.frame = CGRectMake(5, 5, 25, 25);
[btnSender addSubview:imgView];
[self myDelegate];
}
- (void) myDelegate {
[self.delegate niDropDownDelegateMethod:self];
}
在.m文件中使用TextField：
- (IBAction) fnDisplayCategory:(id)sender {
[pTxtCategory resignFirstResponder];
if(pBtnCategory == nil) {
CGFloat f = 200;
pBtnCategory = [[NIDropDownForTwoArrays alloc]showDropDown:pTxtCategory :&f :pArCategory :@"down" :1];
pBtnCategory.delegate = self;
NSUserDefaults *defaults = [NSUserDefaults standardUserDefaults];
[defaults setObject:@"First" forKey:@"DropDown"];
[[NSUserDefaults standardUserDefaults] synchronize];
}
else {
[pBtnCategory hideDropDown:pTxtCategory];
[self rel];
}
}
- (void)rel {
pBtnCategory = nil;
}