auto-increment

Given a Schema: var EventSchema = new Schema({ id: { // ... }, name: { type: String }, }); I want to make id unique and autoincrement. I try to realize mongodb implementation but have problems of understanding how to do it right in mongoose. My question is : what is the right way to implement autoincrement field in mongoose without using any plugins and so on? Here is a good example of auto-incremented fields implementation using Mongoose: var CounterSchema = Schema({ _id: {type: String, required: true}, seq: { type: Number, default: 0 } }); var counter = mongoose.model('counter',

I am having mysql table with one id field as auto-increment . When I insert values to the table am getting error as 1467 - Failed to read auto-increment value from storage engine Also the show table status shows me that the field with auto increment has 18446744073709551615 as Auto_increment value. What would be the issue can any one help me ....? Problem could absolutely be that: convert 18446744073709551615 to hex and you'll find $FFFF-FFFF-FFFF-FFFF . If your field is an unsigned 64bit you reach its limit. I had the same error but in my case I had about 1.5k records in the table. I fixed it

One of my tables has the following definition: CREATE TABLE incidents ( id serial NOT NULL, report integer NOT NULL, year integer NOT NULL, month integer NOT NULL, number integer NOT NULL, -- Report serial number for this period ... CONSTRAINT PRIMARY KEY (id), CONSTRAINT UNIQUE (report, year, month, number) ); How would you go about incrementing the number column for every report , year , and month independently ? I'd like to avoid creating a sequence or table for each ( report , year , month ) set. It would be nice if PostgreSQL supported incrementing " on a secondary column in a multiple

"Auto increment" alphabet in Java - is this possible? From A to Z without a third-party library? Richie Yes, you can do it like this: for (char alphabet = 'A'; alphabet <= 'Z'; alphabet++) { System.out.println(alphabet); } It is also possible with typecasting: for (int i = 65; i <= 90; i++) { System.out.println((char)i); } Taylor Leese Yes, like this: for (int i = 0; i < 26; i++) { char upper = (char) ('A' + i); char lower = (char) ('a' + i); ... } for (char c = 'A'; c <= 'Z'; c++) { ... } Michel Gokan You are looking for something like this: for( int i = 'a'; i < 'z'; i++ ) System.out.println

Long story short, I have a SQL file that I want to import as a skel style file, so this will be done repeatedly, programmatically. I can edit the SQL file however I want, but I'd rather not touch the application itself. This application uses userid = 0 to represent the anonymous user. It also has a relevant (blank) entry in the database to represent this 'user'. Hence, the line in my skel.sql looks something like this: INSERT INTO `{{TABLE_PREFIX}}users` VALUES (0, '', '', '', 0, 0, 0, '', '', 0, 0, 0, 0, 0, NULL, '', '', '', NULL); The problem with this is that uid is a auto_increment field,