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Convert Newtonsoft.Json.Linq.JArray to a list of specific object type
... So how to handle if the array has a null field? This time i get the error JsonSerializationException. I want the data and i want it remain null for any null data.
– Ensar Turkoglu
Apr 19 '17 at 11:09
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Set database from SINGLE USER mode to MULTI USER
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That error message generally means there are other processes connected to the DB. Try running this to see which are connected:
exec sp_who
That will return you the process and then you should be able to run:
kill [XXX]
Wher...
How to run Rails console in the test environment and load test_helper.rb?
...want to call one of them, you need an instance of that class. By trial and error, ActiveSupport::TestCase.new has one required parameter, so...pass it something.
If your test_helper has a method called create_user, you could invoke it this way:
ActiveSupport::TestCase.new("no idea what this is for"...
Postgresql GROUP_CONCAT equivalent?
...ner results to TEXT first. So "string_agg(value_field)" would generate an error if value_field is an integer. "string_agg(value_field::text)" would be required. The array_agg() method requires only one cast after the aggregation (rather than a cast per value).
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How do I stop Chrome from yellowing my site's input boxes?
...his works in Chrome (haven't tested), you could set this attribute when an error is encountered.
This can be used for both a single element
<input type="text" name="name" autocomplete="off">
...as well as for an entire form
<form autocomplete="off" ...>
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How do you append an int to a string in C++? [duplicate]
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How do you this avoid the compilation error that now with the templated solution std::string("a") + std::string("b") is ambiguous?
– Jason Harrison
Nov 9 '14 at 21:55
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Properly removing an Integer from a List
...'n' will be converted/boxed/unboxed as required or you will get a compiler errors if it cannot.
– Peter Lawrey
Dec 26 '10 at 14:53
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Laravel Eloquent: How to get only certain columns from joined tables
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I tried this and it shows an error SQLSTATE[42S22]: Column not found and it's SQL doesn't include the table in the with. The sql that it appears on the error is "SELECT fk_table.column1 FROM main_table".
– Michel Ayres
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How do I perform a Perl substitution on a string while keeping the original?
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Ah, but the one line version isn't subject to the error in the question of unintentionally modifying the wrong string.
– ysth
Sep 19 '08 at 6:13
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Cannot simply use PostgreSQL table name (“relation does not exist”)
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From what I've read, this error means that you're not referencing the table name correctly. One common reason is that the table is defined with a mixed-case spelling, and you're trying to query it with all lower-case.
In other words, the following f...