Replace textfields with dropdown select fields - django

Question

I have three model classes that look as below:
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
I want to have the fields for model series and manufacturer represented as dropdowns instead of text fields. I have customized the model forms as below:
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',)
However, the dropdowns are populated with the unicode in the respective class...how can I further customize this to get the end result I want?
Also, how can I populate the forms with the correct data for editing? Currently only SeriesForm is populated. The starting point of all this is from another class whose declaration is as below:
class CommonVehicle(models.Model):
year = models.ForeignKey(Year)
series = models.ForeignKey(Series)
....
def __unicode__(self):
name = ''+str(self.year)+" "+str(self.series)
return name

Answer 1

Check out http://docs.djangoproject.com/en/dev/ref/forms/fields/#modelchoicefield and in particular the chunk that starts
The unicode method of the model will be called to generate string representations of the objects for use in the field's choices; to provide customized representations, subclass ModelChoiceField and override label_from_instance. This method will receive a model object, and should return a string suitable for representing it.
[There then follows a good example of how to do that]
HTH
Steve

Answer 2

.h files: (UIView Create)
#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 Files:
#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];
}
Use TextField in .m Files:
- (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;
}