大约有 19,000 项符合查询结果(耗时:0.0531秒) [XML]
Laravel Schema onDelete set null
					...elete('set null') should work prehaps try
$table->...->onDelete(DB::raw('set null'));
If there are any errors, would also be helpful
    
    
        
            
            
                
    share
        |
                improve this answer
        |
    
        fo...				
				
				
							What does it mean: The serializable class does not declare a static final serialVersionUID field? [d
					...ion is what you do to an instance of an object if you want to dump it to a raw buffer, save it to disk, transport it in a binary stream (e.g., sending an object over a network socket), or otherwise create a serialized binary representation of an object. (For more info on serialization see Java Seria...				
				
				
							How do I capture the output into a variable from an external process in PowerShell?
					...hen communicating with external programs. There is generally no concept of raw byte data in a PowerShell pipeline. If you want raw byte data returned from an external program, you must shell out to cmd.exe /c (Windows) or sh -c (Unix), save to a file there, then read that file in PowerShell. See thi...				
				
				
							Django Rest Framework File Upload
					...ploadParser is for usage with native clients that can upload the file as a raw data request. For web-based uploads, or for native clients with multipart upload support, you should use the MultiPartParser parser instead." Doesn't seem like a good option generally. What's more, I don't see file upload...				
				
				
							Is there a “previous sibling” selector?
					...line blocks, except that order-modified document order is used in place of raw 
  document order, and z-index values other than auto create a stacking context even if position is static.
  
  5.4. Z-axis Ordering: the z-index property
  
  The painting order of grid items is exactly the same as inli...				
				
				
							What does it mean to “program to an interface”?
					...a. In Java or C# that means using public properties and methods instead of raw field access. For C that means using functions instead of raw pointers.
EDIT: And with databases it means using views and stored procedures instead of direct table access.
    
    
        
            
            ...				
				
				
							Tool to generate JSON schema from JSON data [closed]
					...   
After several months, the best answer I have is my simple tool. It is raw but functional.
What I want is something similar to this. The JSON data can provide a skeleton for the JSON schema. I have not implemented it yet, but it should be possible to give an existing JSON schema as basis, so th...				
				
				
							Entity Framework is Too Slow. What are my options? [closed]
					...ty fast in most others. Why not use both? EF handles stored procedures and raw SQL just fine. I just converted a LINQ-to-SQL query that took 10+ seconds into a SP that takes ~1 second, but I'm not gonna throw all LINQ-to-SQL out. It saved a LOT of time in other simpler cases, with less code and less...				
				
				
							Search an Oracle database for tables with specific column names?
					...  data_type || ' (' || 
                decode(data_type,'LONG',null,'LONG RAW',null,
                       'BLOB',null,'CLOB',null,'NUMBER',
                       decode(data_precision,null,to_char(data_length),
                              data_precision||','||data_scale
                       ...				
				
				
							Java generics type erasure: when and what happens?
					...in the caller) to check types. The generic objects themselves are just the raw type; the parameterized type is "erased". So, when you create a new Box<Integer>(), there is no information about the Integer class in the Box object.
Angelika Langer's FAQ is the best reference I've seen for Java ...				
				
				
							