multiple-models | 易学教程

How to handle complex form with multiple models and tabular input in yii

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问题 I've read a lot of documentation about how to handle models and forms in yii and I've found a solution that works for the case that I explain following, but the problem is that the code is complex to write and to maintain, so I'm looking for suggestions. The case is the following: I need to save together two different models and a third model that is a tabular input (more instances of the same model). For instance, I may want to save a Blog post (first model) with the author information

Why would my form submit only one model's data?

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问题 I have a form that is intended to submit two models, the first model has_one of the other model, Student_Detail . Many users on here have helped me with some errors that I encountered already, and now my form submits successfully, but only submits the primary model, Participant . I've submitted the form a few times and it stores all information that is a direct attribute of the Participant model. In active admin the Participant model data populates, but no Student_Detail records exist. In the

What the controller should receive when I am sending a view that contains multiple partial view with different models?

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问题 What should the controller should receive when I am sending a view that contains multiple partial view with different models. I have a view that renders multiple/dynamic partial views (these views are selecting depending on the package that the user previously selected ), all of these partial views have different models and I need to submit them in one big "parent" form. My main concern is what should the controller receive? and how to handle all the information inside he form, since I have

Simple Way to Combine Predictions from Multiple Models for Subset Data in R

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问题 I would like to build separate models for the different segments of my data. I have built the models like so: log1 <- glm(y ~ ., family = "binomial", data = train, subset = x1==0) log2 <- glm(y ~ ., family = "binomial", data = train, subset = x1==1 & x2<10) log3 <- glm(y ~ ., family = "binomial", data = train, subset = x1==1 & x2>=10) If I run the predictions on the training data, R remembers the subsets and the prediction vectors are with the length of the respective subset. However, if I

Rails 3 Nested Model Form, 2 levels deep using accepts_nested_attributes_for

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问题 My nested model form is working great on the first level deep. But I was under the impression that you could go many levels deep using accepts_nested_attributes_for. But when I try the code below, the "Image" attributes are attached to the top level "Question" model and it breaks upon form submission with an unknown attribute "Image" error. I could do the inserts all by hand using the form data but if Rails can handle it automatically, it would be better for obvious reasons. What am I doing

How do I create multiple entries in one view in C# ASP.NET MVC?

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问题 I have a Company model and an Employee model and I want to create a Company and then create multiple employees for the company in one view. How should I do this in the view? And what should I do in the Create POST method to support this multi-entry view? 回答1: I really have no idea what you are talking about but here's a wild guess: One entry Foo , multiple enries, IEnumerable<Foo> . Sounds familiar? 回答2: If I understand the question, I think this article is relevant: http://www.hanselman.com

Rails form with three models and namespace

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问题 Banging my head against this one for a long time. On Rails 2.3.2, Ruby 1.9.1. Trying to use one form to create three objects that have these relations: class Person has_one :goat end class Goat belongs_to :person has_many :kids end class Goat::Kid belongs_to :goat end Here's a summary of the schema: Person first_name last_name Goat name color Goat::Kid nickname age I'd like my #create action to instantiate new instances of all three models with the specified associations. However, while it

expected Hash (got Array) for param 'samples'

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问题 I have been following Railscasts episodes of Nested forms and complex forms. During the time of creating multiple model in a single form I was able to edit, update, delete and create records for sample models that were nested in the Batch model. I have been breaking my head from a long time and tried searching around as well but could not get any right solution for solving this problem. my development log file gives me the following error. ERROR MESSAGE: Status: 500 Internal Server Error

MVC4 Multiple Databases

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问题 I'm new to MVC4 framework & been working on an Licensing application that must use different databases for different products (each database contains handful tables for one product - all generated by proprietary licensing tool). My application shall be able to support CRUD functions on various products, thus requiring more than one DbContext objects in relation to different model for each product. As far as I know, each such DbContext object requires a connection string in the Web.config file

How to handle complex form with multiple models and tabular input in yii

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I've read a lot of documentation about how to handle models and forms in yii and I've found a solution that works for the case that I explain following, but the problem is that the code is complex to write and to maintain, so I'm looking for suggestions. The case is the following: I need to save together two different models and a third model that is a tabular input (more instances of the same model). For instance, I may want to save a Blog post (first model) with the author information (second model) and a list of references (third model, the tabular one). I'd like to validate all of them via