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Dynamically adding a form to a Django formset with Ajax
I want to automatically add new forms to a Django formset using Ajax, so that when the user clicks an "add" button it runs JavaScript that adds a new form (which is part of the formset) to the page.
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Convert Pandas column containing NaNs to dtype `int`
...For one of the columns, namely id , I want to specify the column type as int . The problem is the id series has missing/empty values.
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Converting a string to JSON object
How do you make JS think that a string is JSON ?
9 Answers
9
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Specifying column name in a “references” migration
I want to make a migration in Rails, referencing another table. Usually, I would do something like:
6 Answers
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ListView addHeaderView causes position to increase by one?
... a code snippet with a ListView. I added an emptyView and a headerView. Adding the headerView causes the position in the onItemClick to be increased by one.
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Simple way to transpose columns and rows in SQL?
How do I simply switch columns with rows in SQL?
Is there any simple command to transpose?
9 Answers
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Check if a string is null or empty in XSLT
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test="categoryName != ''"
Edit: This covers the most likely interpretation, in my opinion, of "[not] null or empty" as inferred from the question, including it's pseudo-code and my own early experience with XSLT. I.e., "What is the equivalent of the following Java?":
!(categoryName =...
How to add a primary key to a MySQL table?
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After adding the column, you can always add the primary key:
ALTER TABLE goods ADD PRIMARY KEY(id)
As to why your script wasn't working, you need to specify PRIMARY KEY, not just the word PRIMARY:
alter table goods add column `id` ...
Hibernate JPA Sequence (non-Id)
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Looking for answers to this problem, I stumbled upon this link
It seems that Hibernate/JPA isn't able to automatically create a value for your non-id-properties. The @GeneratedValue annotation is only used in conjunction with @I...
How to bind multiple values to a single WPF TextBlock?
I'm currently using the TextBlock below to bind the value of a property named Name :
4 Answers
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