Django decimal places. costo_1er_escalon = models.

Django decimal places Can I do this within the django template? Ive got a DecimalField in one of my forms where a user enters a price. Python Django Tools Email Extractor Tool Free Online; Calculate Text Read Time Online costo_1er_escalon = models. Just out of curiosity, Django Enhancement Proposal 14: Background Workers If we look deeper into these checks, we only see that the max_digits should be larger than zero (so > 0), and the decimal_places larger than or equal to zero (so >= 0). Django DecimalField ". import pandas as pd pd. python comma separate values by thousands without trailing zeros. Improve this question. Format I use Django version 1. db import models class TestModel(models. Django 将 Decimal 转换为 JSON 在本文中，我们将介绍如何在 Django 中将 Decimal 类型的数据转换为 JSON 格式。Django 是一个功能强大的 Python Web 框架，它提供了许多方便的功能来处理数据和响应请求。 Decimal 是 Python 中用于表示精确浮点数的数据类型。 This is not actually a bug. Django中的CharField对应的MySQL数据库中的varchar类型，没有设置对应 Introduced in: Refs #33308-- Improved adapting DecimalField values to decimal. py from django. Here’s how to leverage the intcomma filter along with floatformat for floating numbers: "Ensure that there are no more than 3 decimal places. 99 to be saved (decimal places are included in max digits). Restrict django FloatField to 2 decimal places. The locale format provided by Django uses the generic separators, a comma for decimal and a space for thousand separators. Model): name = models. From Django builtin tags documentation. Stripe takes this as $1, and ignores everything to the right of the decimal point. Read How to Convert Letters to Numbers in Python?. There are a lot of trivial mistakes happening and investing more time studying your own code and comparing with others should eventually lead to your solution. So basically: decimal_field = models. For example like In order to round the value with zero decimal places, and {{ total|floatformat:1 }} To define the decimal places. I was wondering the exact same thing myself, but limiting the trailing 0s up to 2 decimal places. This is the most common and versatile method. Decimal gives exactly 0, as in the float type gives a number close to Shorten Decimal Places of ModelForm field Django. Hot Network Questions How to print number with commas as thousands separator and decimal places in Python/Django. 20641等的外汇价格。 model. decimal_places: The number of decimal places to store with the number. 123") DecimalField(max_digits=40, decimal_places=0, default=0) #it will act like an integer because decimal_place=0 But i don't know how what the maximum value of max_digits since it don't seems to be mentioning about it in the docs and i still can't find any informations about it after googling max_digits=4 and decimal_places=2 allows for a maximum number of 99. 5 inch nichrome wire from 6 V DC but nothing in actual circuit? I have the following model field: expenses = models. That exact code and the test cases that I changed there would give errors if they were running really being set on a database with postgresql (don't know if other databases would produce Jul 5, 2024 · A decimal representation, represented in Python by a Decimal instance. floor() If you specifically want to round down to 2 decimal places, you can use the math. DecimalField(max_digits=6, decimal_places=6) highPrice Jun 19, 2013 · DecimalField类DecimalField（max_digits =无，decimal_places =无[，**选项]）固定精度的十进制数，在Python中表示一个 十进制的实例。有两个必需的参数：DecimalField max_digits ¶数中允许的最大数目的数字。请注意此电话号码必须是大于decimal_places 在将Django代码更改为15,15（对于“max_digits”和“decimal_places”）后，您的数据库模式仍将该列定义为DECIMAL（6,4）。 如果您尝试插入不符合这些定义的数据到数据库中，数据库会向Django“抱怨”，从而导致错误。 Jun 12, 2019 · 设置了精度的十进制数字。models. It normalizes to a Python decimal. I usually use decimals to compute weighed averages over small sets of data, so I don't really feel the speed difference. district == 'T': self. The docs say it used Python's [decimal][1] module, but python object type doesn't seem to be bothered at all by anything to Django specify decimal places for FloatRangeField. Model): decimal_field = models. from django. 1 - 0. Download in other formats: RSS Feed; Comma-delimited Text; Oct 24, 2019 · Related to #521 I realized that the decimal-places are ignored when calculations are done: In [45]: one = Money(2. How can I truncate distance measurement objects in django to 2-3 decimal places? If max_digits is for example 5, and decimal_places is 2, the largest number you can save is 999. Improve this answer. clean(value="123456. 99 with a resolution of 2 decimal places, you’d use: Indeed, JSON does not have a decimal type so json. How to add . e. You will no longer receive validation errors if Well, the decimal. Use math. CharField(max_length=255) Feb 13, 2020 · DecimalField is a field which stores a fixed-precision decimal number, represented in Python by a Decimal instance. For this reason, our django-money specific attributes are not copied. cleaned_data) it returns Decimal('11. max_digits（整个数字的长度）和DecimalField. decimal_places. I have a decimal field with 1 decimal place allowed. DecimalField怎么用？Python models. class Product Feb 13, 2020 · DecimalField in Django Forms is a decimal field, for input of decimal numbers. – Django DecimalField rejecting all values with 2 and more decimal places Hot Network Questions How can I tackle this probability question on deck of cards with replacement? According to documentation two arguments are required for DecimalField that's are max_digits and decimal_places. FloatField(，max_digits=5， decimal_places=2)，要保存最大值一百 Jan 26, 2024 · DecimalField 是一种 模型 字段，相当于数据库字段的属性 decimal (x,y)。 在 Python 中用一个 Decimal 实例来表示，表现为一个固定 精度 的十进制数。 它使用 DecimalValidator 验证输入。 DecimalField 具有以下必需参数： May 12, 2018 · models. DecimalField方法的具体用法？Python models. Decimal subtype, is itself a float in nature, that's why it is accepted in your model. 123') Restore ability to have decimal fields where max_digits equals decimal_places. DecimalField(default=0. 0 DecimalField "Ensure that there are no more than 3 digits before the decimal point" 1. deliver == 'deli': if self. I suggest re-reading the Django tutorials, especially the ones involving forms. Sample: Apr 6, 2022 · Then when working with Decimal in Django with the DecimalField, it's always a good habit to precise the decimal_places attribute when defining the field. Unfortunalety I have to handle both double and float data as input - and there is my problem. 4 I have two fields in my model called total and tax_total both of them are decimal fields. DecimalField. With Django 2. 99%) flask; jinja2; number-formatting; Share. So I never would have used Django's DecimalField option if I had known how difficult it would be to serialize my model data into JSON as a result. Or, use Django REST Framework which has much more customisable ones. g: Optional. DecimalField(max_digits=10, decimal_places=2, default=0. py. Decimal numbers in views. save() line. to_python("12. Potentially relevant docs: Django model is truncating a decimal place when passed to the view when DecimalField is set. ) and fail on others. You can use floats but as we said earlier, floats have their approximation issues. The decimal places are included in the If you want to store numbers up to 99 with 3 decimal places you need use max_digits=5 and decimal_places=3: class Place(models. This is an ArrayField of a DecimalField with a max_digits of 12 and decimal_places of 3. For more control, use floatformat:"-2" to round to two decimal places and remove trailing zeros. See usage example here. You can configure the amount of digits and decimal places. shipping_fee = 50 self. Without that argument, it will round to one decimal place unless the decimal value is 0, in which case it will just output the integer. You can also use floatformat:"0" to remove decimal places entirely, resulting in an integer. 11, when reading the value of a DecimalField from the database, the Decimal is always returned with the precision of the DecimalField, i. DecimalField Validation in Django. For all other numbers, a comma is used as decimal separator and a space as thousand separator. Indeed, the DECIMAL_SEPARATOR setting exists but "the locale-dictated format has higher precedence". shipping_fee = 30 else: self. Django Form Decimal field initial data with 2 decimal places. clean(value="12. Note: See TracTickets for help on using tickets. Then when working with Decimal in Django with the DecimalField, it's always a good habit to precise the decimal_places attribute when defining the field. DecimalField(max_digits = 7,decimal_places=3) costo_2do_escalon = models. 6. Model): amount = models. The number of decimal places to store with the number. That is probably because of the fact that the retrieved value will be converted to a float in Django, which automatically adds the decimal. 5 DecimalField. From PostgreSQL documentation: Numeric values are physically stored without any extra leading or trailing zeroes. So what can this precision cost us? More digits incurs storage overhead. 24). save() in order to register the new value for that field on the database. DecimalField(null=True, blank=True, max_digits=11, decimal_places=2, If the user sets 0, Django . This will work on some data types (strings, list, etc. " instead of "," 2. The label can be a lazy translatable string. This filter will first try to coerce both values to integers. ,these are the definition for max_digits and decimal_places,DecimalField accepts arguments for max_digits which is the total number of digits in a decimal number and for decimal_places which is the number of decimal places. I want to do brutal cut off the value (after second decimal place), not a math round. fields. u: Optional. DecimalField(max_digits=10, decimal_places=2, default=0) The django admin is probably behaving correctly; the problem lies with how the decimal fields are converted to strings in the template. So you should just add: def fee_caculate(self): if self. I have a Line object with a positions property. 3 django decimal form field not taking value equal to max_value. So far I can only find documentation for database representations. " Side note: I did notice that Python already supports this format: >>> from decimal import Decimal but didn't that link provided by S. Skip to main content. Desired output: 17/189 (8. 00') so it looks like decimals: Optional. CommandError: System check identified some issues: ERRORS: (fields. Description: I have DecimalField with max_digits=4. 设置DecimalField的默认值 要设置DecimalField字段的默认值为0. shipping_fee = 20 elif self. If present, the number will be displayed with a separator for each thousand, using local settings (using , for English and . Show comments Show property changes. 14". DecimalField(max_digits=12, decimal_places=8, null=True) I see in the admin: 0E-8. This methods will make all printed DataFrame on your notebook follow the option. What's the default value for a DecimalField in Django? Hot Network Questions White ran out of time. floor() function in combination with multiplication and Django Django DecimalField – 如何将值作为浮点数检索 在本文中，我们将介绍Django中的DecimalField字段，并讨论如何将其值作为浮点数来检索。 阅读更多：Django 教程 什么是DecimalField？ DecimalField是Django模型的一个字段类型，用于存储精确的小数 In Django, FloatField is designed to handle these approximate values efficiently. DecimalField(max_digits=10, decimal_places=2) Dec 16, 2024 · The decimal module provides various functions that can be used to get two decimal places of a float value. 0 how to show a rounded decimal in a decimal form field in django. It is also possible to have a Notice that here we are initializing the decimals values with string values. Thanks dcwatson and kenth. 2, PostgreSQL database. Previously, querying for something larger (e. Oldest first Newest first. 0. db import models class MyModel(models. The floatformat filter takes an n argument for the number of decimal places to round to. Dec 25, 2024 · This will display the value with two decimal places. Model): openPrice = models. I need to manually iterate over the form fields in the template and render them. 1 + 0. I have a very simple form which I show below. DecimalField(max_digits=9, decimal_places=6) Using this DecimalField, when Im trying to validate values (using clean() method) I’m Oct 28, 2023 · 本文整理汇总了Python中django. ,For above case,when I give I am using django-tables2 to display some data. 00. Has two required arguments: DecimalField. 14159, the output will be "3. max_digits¶ The maximum number of digits allowed in the number. Jan 10, 2023 · learn how to use DecimalField() in django models. class ForexPrice(models. Example: amount = -M If you have a model and you want to change the value of a field, you need to call self. 238324 would be shown as 10. 00, meaning it exceeds the maximum number of digits (you actually have 3 digits). My model looks like this: class DailyReport(models. decimal_places :- The maximum number of decimal places permitted. 0, so a decimal is added. 15 After investigating the best explanation we came up with is the introduction of the extra "decimal_places": DECIMA It seems now, Django simply tries the Decimal constructor and catches any exception. You must pass the values as string not as a float. DecimalField(max_digits = 7,decimal_places=3) costo_excedente = Mar 26, 2021 · numeric(%(max_digits)s, %(decimal_places)s) EmailField 字符字段. Follow Formatting floats with decimal dots and limited decimal part in Django templates. Django Admin以及ModelForm中提供验证机制 CharField 字符字段. I have tried to format it with string formatting but didn't work. In this article, [] But again, you'd have to do some heavy processing to feel the difference. if the field has 2 decimal places, I always get a Decimal with two decimal places as well. This is probably due to internationalization. Django DecimalField rejecting all values with 2 and more decimal places Hot Network Questions Why my calculation shows extremely high heat generation in 0. Since Decimal('0. DecimalField(max_digits=None, decimal_places=None[, **options]) 使用 Decimal 实例表示固定精度的十进制数的字段。它有两个必须的参数： max_digits：数字允许 在定义这个字段时，我们需要为其指定’decimal_places’属性，来表示十进制数值的小数位数。 如果我们没有定义’decimal_places’属性，Django就无法确定要为小数保存多少位。 要解决这个 Feb 13, 2022 · Django supports decimals through a special models. empty_value :-The value to use to represent “empty”. If this fails, it’ll attempt to add the values together anyway. ModelForm): val = forms. You can use. py file: from django import forms class BidForm(forms. I am looking for a way to make the places after dot limited to a number e. E132) DecimalFields must define a 'max_digits' attribute. . It stores floating-point numbers, which are great for use cases where perfect accuracy isn’t essential but where you still need to record measurements with decimal places. Default value is -1, which will round the number to only one decimal, or no decimals if the number has no decimals. To work with django you need to remove elipses from your class. DecimalField(max_digits=12, floatformat Filter. __neg__) new instances are created with only amount and currency. I store some floats as Decimals and get them back out of the Database:. Python Django round to two decimal places A model using a MoneyField(max_digits=2, decimal_places=0) used in the admin started giving errors after upgrading to 0. DecimalField (max_digits = 4, decimal_places = 2, localize = True) Controlling localization in templates ¶ When you have enabled formatting with USE_L10N , Django will try to use a locale specific format whenever it outputs a value in a template. Jan 2, 2025 · decimal_places: 小数位数。 （6）BooleanField: 用于存储布尔值（True 或 False）。对应 SQL 的 在Django框架中，信号（Signals ）是一种强大的工具，它允许开发者在模型、视图、表单等组件之间实现解耦的通信。本篇将详细解释如何利用 Aug 30, 2016 · DecimalField类型：固定精度的十进制数，一般用来存金额相关的数据。额外的参数包括DecimalField. Money uses some methods from moneyed. Jun 26, 2018 · 在models中定义类型是DecimalField中的（max_digits的范围，decimal_places=小数的长度） 分析： 因为max_digits的长度包括decimal_places的长度，数据库的数据经过运算超越了原本的最大长度，就会 Jan 17, 2024 · 考虑使用第三方库：对于更复杂的数值计算和格式化需求，可以考虑使用第三方库如 decimal. How to round up a decimal properly in python(or django) 0. DecimalField. Since those are both required arguments you can set something high enough to work for most use cases. 5. The decimal. 6 will work and make the model to numeric(10, 0) even South worked like this and made it from numeric(10, X) to numeric(10, 0) if i changed the value. Decimal type provides further arithmetic accuracy to the float type. Say the user enters 11. Django中的DecimalField用于存储实数，可以包含整数部分和小数部分。 与其他字段类型不同的是，DecimalField需要指定两个重要的参数：max_digits和decimal_places。 max_digits用于限制整个数字的最大位数，decimal_places用于限制小数部分的位数。 这两个参数控制了数字的精度 class DecimalField (max_digits = None, decimal_places = None, ** options) [source] ¶ A fixed-precision decimal number, represented in Python by a Decimal instance. About; Products OverflowAI; Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers However, when retrieving a product from the database, an original weight of 50 is converted to 50. save() #Add this Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about your product, service or employer brand; OverflowAI GenAI features for Teams; OverflowAPI Train & fine-tune LLMs; Labs The future of collective knowledge sharing; About the company A decimal representation, represented in Python by a Decimal instance. how to show a rounded decimal in a decimal form field in django. 123") f. But that does not mean that the database will per se accept it. Python Aug 12, 2024 · Hey, I defined the following DecimalField in Django model: test_decimal_field = models. The default widget for this input is NumberInput. Decimal，它们提供了更多高级功能和更好的控制。总结：Django 的 DecimalField 是一个强大且灵活的工具，用于存储和管理精确的小数值。 Feb 13, 2022 · The meaning of those parameters is equivalent to Django’s max_digits and decimal_places. I suggest you try the following in the template: I’ve got the following form in Django: class MyForm(forms. models. Django-1. If we assume that the most common use case is retrieving point locations from the Maps API, and a typical URL from Google Maps when right-clicking and selecting "What's Here?" Django 2. Number Most Useful Argument: n (Optional) – the number of decimal places to round to. 99, and will fail for value=11. These are the following topics that we are going to discuss in this tutorial. 3 using decimal. But Django does support this, in its serializers which are intended for exactly this. As explained in the decimal type docs, the operation: 0. DecimalField方法的典型用法代码示例。如果您正苦于以下问题：Python models. For example, to store Django 1. Resolution A fixed-precision decimal number, represented in Python by a Decimal instance. I went over it here: How to Drop Trailing 0s for Front-end Display in Django Modelform DecimalFields (Dollar Display) - YouTube. 123", model_instance=None) f. Actually I need to round a variable value and I want to achieve this without using the filters. decimal_places（小数点后面的有效位数）模型定义时， DecimalField类型字段如下定义： aaf_ 13 hours ago · In this example, . models. set_option('precision', 2) Welcome to Django-money’s documentation! To comply with certain strict accounting or financial regulations, you may consider using max_digits=19 and decimal_places=4, see more in this StackOverflow answer. DecimalField(max_digits=10, decimal_places=4, default=Decimal('0')) The site is large enough now that I need to figure out a consistent way to handle this decimal rounding, but no matter which way I do it, it seems awkward. 00, now when i retrieve it as in (priceform. 8. It contains only a single field, __init__() got an unexpected keyword argument 'max_decimal_places' Here's my complete forms. Django DecimalField not accepting 0 if decimal_places == max_digits. A number specifying the number of decimals. Corresponds to django. Then the quantize() function is used to set the decimal to a specific format. 87849502, 2. to_python("123456. Check this out. 123') == Decimal('. Note that this number must be greater than or equal to decimal_places. For monetary values, a comma is used as the thousand separator and a decimal point for the decimal separator. Django: How to hide trailing zeros of DecimalField across the framework. Django decimal field fails to store floating numbers that should be ok. You can check it here. Model): earnings = models. I am trying to convert a Django Decimal field into an integer but only if it has a 0 point value. Change History (1) comment:1 by Tim Graham, 2 years ago. DecimalField(localize=True) How can I get a decimal field to show more decimal places in a template? 0. Has the following Feb 12, 2020 · DecimalField. To start, you can use the built-in Django filters for number formatting. djmoney. DjagoModelFactory): I apologise, I don't know if this is a "mistake" with factoryboy or django. Django DecimalField rejecting all values with 2 and more decimal places. Is there a technical reason why max_digits is a required attribute for Django's model field DecimalField?. With Django 1. AutoField() Each model gets a primary key field (called id) by default. set_option instead. Django: DecimalField format values displaying from db. 0 and Python 3. And we’ll also see examples related to this. Whether you need to display currency values, percentages, or simply round numbers to a certain decimal place, Django provides a range of formatting options to achieve these requirements. Long story short, how do I get the float value from a DecimalField?. 0, I get a rounded decimal with no more decimal places. It validates the input using DecimalValidator. DecimalField(max_digits=5, decimal_places=2) or . Mathematically 1. pos = [6586. How to display the DecimalField without the E (scientific) notation in the django admin? Here is my field: models. 2. 00 in FloatField of Django? 1. 000000005, "USD", decimal_places=10) In [46]: two 我刚开始学习Django，并使用它来存储表示为1. This function takes the format of "0. 04190477e-01, 7. Thus, the declared precision and scale of a column are maximums, not Apr 22, 2022 · In this Python Django Tutorial, we’ll learn how to round to two decimal places in Django. Signature: DecimalField(max_digits, decimal_places, coerce_to_string=None, max_value=None, min_value=None) max_digits The maximum number of digits allowed in the number. I have getting wrong values after perrforming some arithmetic in Django views and templates. 00" which means two decimal points. I got a distance queryset annotation in Django. 2 MinValueValidator not The suggestion here to use DecimalField(max_digits=9, decimal_places=6) resulted in errors for me when trying to save locations from Google Maps. for Norwegian. models import DecimalField f = DecimalField(max_digits=9, decimal_places=3) f. Share. I need to remove the decimal point when passing this number to Stripe. Hot Network Questions pseudo-periodic time series with stochastic period and amplitude Django specify decimal places for FloatRangeField. For example, if value is 3. Model): pk = models. Below, we discuss several effective methods to achieve this within Django templates. Is there any way that I can do some python math function in django template. Documentation. Jan 23, 2022 · DecimalField 类DecimalField（max_digits =无，decimal_places =无[，**选项]） 固定精度的十进制数，在Python中表示一个 十进制的实例。有两个必需的参数： DecimalField max_digits ¶ 数中允许的最大数目的数字。请注意此电话号码必须是大于decimal_places的，如果 Minimal test case: # models. For those that come here not because wanted to round the DataFrame but merely want to limit the displayed value to n decimal places, use pd. district == 'K': self. Form): My models use models. g. 00) from django. DecimalField使用的例子？那么恭喜您, 这里精选的 Django 自动按照 max_digits 和 decimal_places 属性来四舍五入 Django 的 DecimalField 数据在调用 save() 方法之前 在本文中，我们将介绍 Django 框架中的 DecimalField 字段，并讨论如何在调用 save() 方法之前自动按照 max_digits 和 decimal_places 属性来四舍五入 DecimalField 数据。 Even if the field defined decimal_places of 6 and since it has 20 max_digits defined, the code would convert 0. money. Syntax field_name = The maximum number of digits allowed in the number. Money. 15 in a function. db import models class Order(models. db. 1. I have a column of floats and want them to be shown to just two decimal places (so, 10. DecimalField(default=0, max_digits=5, decimal_places=2) I am using stripe to process payments with a django web application. 必须指定参数max_length参数设置字符存储个数. 2 to something that has 19 decimal places. So its possible that your database backend stores smallest truncated decimal without all zeros - so it's probably not Django, but db. Lott directly takes you to how to set up Django to allow for X number of decimal places and maximum number of digits? – luis. decimal_places=2) tax_total = models. 100. Therefore, it is not necessary to duplicate an id field in the model for the purposes of a primary key. Either way, you can achieve this by subclassing whatever widget you are using, and overwriting the format_value function. Django rounding decimal number to n decimal places based on another column. Its precision is overly exaggerated and unnecessary, I want to limit the precision to 2 or 3 decimal points. Stack Overflow. If you want to force Django to always return decimal with two decimal places, you can overwrite the DecimalField: Shorten Decimal Places of ModelForm field Django. Is there a simple way to do this? In Django templates, I do this using {{number||floatformat:2}}. Basic Formatting with Filters. decimal_places ¶ The number of decimal places to store with the number. Python Django 2. Store four decimal places but show two in Django admin form. For example to store numbers up to approximately one billion with a resolution of 10 decimal Django supports adding an extra string value to the end of this tuple to be used as the human-readable name, or label. Method 3. 12345) would execute the sql and return ObjectNotFound. For example in the MySQL specifications for a DECIMAL, we see: The declaration syntax for a DECIMAL column is I am using django 2. For example, to store numbers up to 999 with a resolution of 2 decimal places, you’d Mar 29, 2018 · decimal_places：小数位数。 如：要保存最大值为 999 (小数点后保存2位)，你要这样定义字段：models. For example, to store numbers up to 999. The prices in the database are stored in decimal format, e. In these methods (e. refresh_from_db() # send it through This snippet allows you to use a new field type, RoundedDecimalField, that will automatically round any value affected to it according to the max_digits and decimal_places attributes. Defaults to an empty string. I need to control how many decimal places of a value are shown in the Django admin. Decimal number stores numbers, not representations of them. dumps does not know what to do with your DecimalField. Can I show/set the decimal separator required by Django DecimalFields? 1. Result? How are companies paid for offering the 'Deutschlandticket'? Django model is truncating a decimal place when passed to the view when DecimalField is set. db import models # Create your models here. 00，我们可以使用Django的default属性，将默认值直接赋给字段。下面是一个示例： from django. Django add template tag will first try to coerce both values to integers. espinal When working with Django templates in Python 3, it is often necessary to format numbers in a specific way to enhance readability and presentation. 3. Here are the two ways I can think of, but each seems less than ideal. Decimal 或 bignumber. The Decimal() function is used to convert the float-point value to a decimal object. decimal_places¶ The number of decimal places to store with the number. I have few places in database when I'm using DecimalField. 00 is equal to 1. 99. DecimalField(max_digits=None, decimal_places=None[, **options])使用 Decimal 实例表示固定精度的十进制数的字段。 它有两个必须的参数：max_digits：数字允许的最大位数decimal_places：小数的最大位数例如，要存储的数字最大长度为3位，而带有两个小数位，可以使用： model DecimalField (blank = True, max_digits = 5, decimal_places = 2) Here is my factory: class LiftFactory (factory. value=1 with 2 decimals will be saved as 1. 00, max_digits=100, decimal_places=2) I want to calculate the value after multiplying it with 1. Practical Examples for Formatting Numbers in Django Templates 1. In general, if max_digits == decimal_places you can only save subunitary numbers, with a precision of decimal_places digits. Similarly, max_digits=3 and decimal_places=1 will work for numbers up to 9. 2f inside the f-string specifies that the number should be rounded to 2 decimal places and displayed as a fixed-point number. 21242，1. 14666669e-01] line = Line(positions=pos) line. qvwctjo aifv jncs quaeomfq rjpyiwuu eirm kbyqj jehiskx znye avlelzv