model

问题 I have alter my model from arrayfield to json field now i am receiving error cannot cast type character varying[] to jsonb LINE 1: ...LUMN "questionaires" TYPE jsonb USING "questionaires"::jsonb. How to fix this ? and how it did occur? from questionaires = ArrayField(models.CharField(max_length=4000), null=True, blank=True) to questionaires = JSONField(null = True,blank = True) 回答1: I think you have to perform multiple stage migrates: Create temporary new field with type JSONField: Ex

问题 Overview It seems that model validators aren't working the way I think they should, let's consider following example: Code /// <summary> /// Model that holds reserve data passed to <see cref="ReserveController"/> Commit and Cancel actions. /// </summary> public class BaseReserveData { /// <summary> /// Customer identifier in operator's database. /// </summary> [Required] [Range(1, int.MaxValue)] public int cust_id { get; set; } /// <summary> /// Reserve identifier in operator's database. ///

问题 Objective: Use the model to show total sales of an id and total sales difference for multiple periods. Issue: Using MVC4 I have a model for a report that displays total sales. I know I can add a variable for each additional period, but I have many periods that I'd like to use to compare and show a difference. How can this be done avoiding needless repetition? public class Report { public long ID { get; set } public long TotalSales { get; set} public long TotalSales2 { get; set} public long

问题 Clicking the QTableView " Item_B_001 " prints out its row number # 0 . But in source model's self.items this item corresponds to the number # 3. How to get a "real" Source Model's Item's row number - a number it really corresponds to? from PyQt4.QtCore import * from PyQt4.QtGui import * import sys class Model(QAbstractTableModel): def __init__(self, parent=None, *args): QAbstractTableModel.__init__(self, parent, *args) self.items = ['Item_A_001','Item_A_002','Item_B_001','Item_B_002'] def

问题 I am developing a chat app and successfully saved User model class to the realm but now I want to save messages to the realm so that when user start app able to see previous chat history and messages. below my SavedMessages model class @RealmClass public class SaveMessage extends RealmObject { private int mId; private String mUsername; private String mContent; private Date mCreatedAt; private boolean mRightMessage; private String mPictureString; private String mType; public SaveMessage(int id

问题 I have a complex Model public class ComplexModel { public UserModel userModel; public ExtraInfoModel extraModel; } where UserModel may have required fields as in: public class UserModel { [Required] public string email; } how do I validate ComplexModel to make sure that the data annotations on its member models are being taken into the account in ComplexModel validation? Thank you. UPDATE: Here's my exact scenario. When I call ModelState.IsValid in a controller action on ManageProfileModel

问题 Clicking the QTableView " Item_B_001 " prints out its row number # 0 . But in source model's self.items this item corresponds to the number # 3. How to get a "real" Source Model's Item's row number - a number it really corresponds to? from PyQt4.QtCore import * from PyQt4.QtGui import * import sys class Model(QAbstractTableModel): def __init__(self, parent=None, *args): QAbstractTableModel.__init__(self, parent, *args) self.items = ['Item_A_001','Item_A_002','Item_B_001','Item_B_002'] def

问题 I'm trying to get a page to display a list of all the records that are valid at the current time, so comparing the start and end time & date to the time at that current moment. This is the code I have at the moment: def self.time find_by_sql("SELECT * FROM screens s WHERE (s.starttime < CONVERT(varchar(30), GETDATE(), 114)) AND (s.finishtime > CONVERT(varchar(30), GETDATE(), 114))") end However I get this: ActiveRecord::StatementInvalid I know my code isn't right.. I just don't quite know how

问题 I can't seem to update my user and school table anymore but was able to update hobby table now. Keep getting error: implode(): Invalid arguments passed when updating data --> linking back to the question before Controller: //update for user public function edit($id){ $object = user::find($id); return view('edit', compact('object')); } public function update(Request $request, $id){ $object = user::find($id); $object->Name = $request->input('Name'); $object->update(); return redirect('/home');

问题 Forgive if this is general, but I'm looking for an approach and I'm new to Angular. Say I have a main controller and a runtime created modal controller. Let them be WidgetCtrl and NewWidgetModalCtrl. I want to create a Widget and send that data to the server using $resource.save() . It returns some data and we close the "New Widget Modal" (it gets $destroyed). How would I add this widget to the list in WidgetCtrl? Some say to use a shared service/factory. But the problem is that these are