Using django, I added a new entry to my table. Now I want to delete it using PHPPgAdmin (postgresql), but I get No unique Identifier for this row error. What is the problem?
django automatically adds an auto-incrementing primary key, so I cannot figure out what the issue is?
I read this post, but it did not help. If you notice the image carefully, you will see that the primary key column label is id but not pk as it should be in django.
EDIT: No primary key is seen on table;
But this is what django executes;
python manage.py sql auth
CREATE TABLE "auth_user" (
"id" serial NOT NULL PRIMARY KEY,
"password" varchar(128) NOT NULL,
"last_login" timestamp with time zone NOT NULL,
"is_superuser" boolean NOT NULL,
"username" varchar(30) NOT NULL UNIQUE,
"first_name" varchar(30) NOT NULL,
"last_name" varchar(30) NOT NULL,
"email" varchar(75) NOT NULL,
"is_staff" boolean NOT NULL,
"is_active" boolean NOT NULL,
"date_joined" timestamp with time zone NOT NULL
)
;
EDIT: A screenshot from PHPPgAdmin, showing id as primary key
I think this is a bug with phpPgAdmin.
I experienced a similar problem and went directly into psql (using the command ./manage.py dbshell).
I tried deleting the row in question, and received a more helpful error message than the one from phpPgAdmin. (In my case, that the row was being referenced by another table.)
I deleted the row referenced by the other table, and was then able to delete the row in question.
Related
I've created a MySQL Model with a few tables, some of them with fk's to another table. I usually export the SQL from MySQL Model to my database using the "Forward Engineer SQL CREATE Script" inside File -> Export -> Forward Engineer SQL CREATE Script. The problem here is that when I generate the creation script, all my fk's become unique. I didn't check UQ option in MySQL Model but it creates a script with unique fk's anyway, so, I need to change the SQL file generated and remove all the unwanted uniques. Anyone has a clue why this is happening?
Generated script:
CREATE TABLE IF NOT EXISTS `u514786799_detranleiloes`.`Lotes` (
`createdAt` DATE NOT NULL,
`updatedAt` DATE NOT NULL,
`id` INT UNIQUE NOT NULL AUTO_INCREMENT,
`LeiloesId` INT UNIQUE NOT NULL,
`conservado` TINYINT NULL,
`numero` INT NOT NULL,
`CRDsId` INT UNIQUE NULL,
PRIMARY KEY (`id`),
INDEX `fk_Lotes_Leiloes_idx` (`LeiloesId` ASC),
INDEX `fk_Lotes_CRDs1_idx` (`CRDsId` ASC),
CONSTRAINT `fk_Lotes_Leiloes`
FOREIGN KEY (`LeiloesId`)
REFERENCES `u514786799_detranleiloes`.`Leiloes` (`id`)
ON DELETE NO ACTION
ON UPDATE NO ACTION,
CONSTRAINT `fk_Lotes_CRDs1`
FOREIGN KEY (`CRDsId`)
REFERENCES `u514786799_detranleiloes`.`CRDs` (`id`)
ON DELETE NO ACTION
ON UPDATE NO ACTION)
ENGINE = InnoDB
AUTO_INCREMENT = 1;
CREATE TABLE dbo.Users (
id int NOT NULL IDENTITY(1,1),
uid int NOT NULL,
username nvarchar(65) NULL,
password varchar(100) NULL,
firstname nvarchar(50) NULL,
lastname nvarchar(50) NULL,
);
ALTER TABLE dbo.Users ADD CONSTRAINT PK_Users PRIMARY KEY (id, uid);
This is my sql query and want to create data model for this schema using loopback4.
Unfortunately, it doesn't seem that this feature is currently supported. An open issue tracking this feature can be found on their GitHub page here.
I am trying to make a page where i handle my invoces. I have the invoice data in one tables and the invoice rows in another table. The tables looks as follows:
CREATE TABLE IF NOT EXISTS `Invoices` (
`I_Id` int(10) NOT NULL AUTO_INCREMENT,
`I_Number` int(4) NOT NULL,
`I_ClientId` int(10) NOT NULL,
`I_ExtraText` text NOT NULL,
PRIMARY KEY (`I_Id`)
) ENGINE=InnoDB
CREATE TABLE IF NOT EXISTS `InvoiceRows` (
`IR_Id` int(10) NOT NULL AUTO_INCREMENT,
`IR_InvoiceId` int(10) NOT NULL,
`IR_Price` int(10) NOT NULL,
`IR_Vat` smallint(2) unsigned NOT NULL,
`IR_Quantity` int(10) NOT NULL,
`IR_Text` varchar(255) NOT NULL,
PRIMARY KEY (`IR_Id`),
KEY `IR_InvoiceId` (`IR_InvoiceId`)
) ENGINE=InnoDB
Here is my mapping:
class Invoice {
/**
* #ORM\OneToMany(targetEntity="Row", mappedBy="invoice" ,cascade={"persist"})
*/
protected $rows;
}
class Row {
/**
* #ORM\ManyToOne(targetEntity="Invoice", inversedBy="rows", cascade={"persist"})
* #ORM\JoinColumn(name="IR_InvoiceId", referencedColumnName="I_Id")
**/
private $invoice;
}
I have been trying to follow the example at the doctrine docs on how to setup a One-To-Many, Bidirectional mapping. This is then connect with Zend Framework 2 and form collections. Pulling data works very good. I get all the rows of each invoice.
My Problem is when i want to write back to the database and save my changes. When i try to save i get the following error:
An exception occurred while executing 'INSERT INTO
MVIT_ADM__InvoiceRows (IR_InvoiceId, IR_Price, IR_Vat, IR_Quantity,
IR_Text) VALUES (?, ?, ?, ?, ?)' with params
{"1":null,"2":320,"3":0,"4":1,"5":"Learning your dog to sit"}:
SQLSTATE[23000]: Integrity constraint violation: 1048 Column
'IR_InvoiceId' cannot be null
What have i done wrong? When checking the data from the post value is not empty.
Edit: Full source can be found at Github
It seems IR_InvoiceId null, it expect the Id of Invoices (I_Id) value, so make sure while you are inserting the data in InvoiceRows table then here pass the Invoices (I_Id) value as IR_InvoiceId as you mention table relation..
Best Of Luck!
Saran
I have added a new field to my models .From django manage.py how can i print the migration(alter table statement).In the following is_tag is my new field
When i do sqlall i get the following output.How can i get the alter table commands
root#rajeev-laptop:/opt/labs/labs_site# python manage.py sqlall content
BEGIN;
CREATE TABLE `content_content` (
`id` integer AUTO_INCREMENT NOT NULL PRIMARY KEY,
`name` varchar(255) NOT NULL,
`uploaded_by_id` integer NOT NULL,
`is_local` integer NOT NULL,
`access` integer NOT NULL,
`fq_name` varchar(255) NOT NULL,
`description` longtext NOT NULL,
`is_tag` bool NOT NULL,
`timestamp` datetime NOT NULL
)
;
ALTER TABLE `content_content` ADD CONSTRAINT `uploaded_by_id_refs_id_4f9cfefd` FOREIGN KEY (`uploaded_by_id`) REFERENCES `users_userprofile` (`id`);
CREATE INDEX `content_content_1bc5ce19` ON `content_content` (`uploaded_by_id`);
COMMIT;
syncdb will never alter tables, or in the docs own words:
syncdb will only create tables for models which have not yet been installed. It will never issue ALTER TABLE statements to match changes made to a model class after installation. Changes to model classes and database schemas often involve some form of ambiguity and, in those cases, Django would have to guess at the correct changes to make. There is a risk that critical data would be lost in the process.
To manage migrations, you should use South
Really hate to use other people's time, but it seems the problem is just not going away.
I considered all recommendations at http://verysimple.com/2006/10/22/mysql-error-number-1005-cant-create-table-mydbsql-328_45frm-errno-150/ and at http://forums.mysql.com/read.php?22,19755,19755#msg-19755 but nothing.
hope that someone points to a stupid mistake.
here are the tables:
CREATE TABLE IF NOT EXISTS `shop`.`category` (
`id` INT(11) NOT NULL AUTO_INCREMENT ,
`category_id` INT(11) NOT NULL ,
`parent_id` INT(11) NULL DEFAULT '0' ,
`lang_id` INT(11) NOT NULL ,
...other columns...
PRIMARY KEY (`id`, `category_id`) )
ENGINE = InnoDB
DEFAULT CHARACTER SET = utf8
COLLATE = utf8_unicode_ci;
CREATE TABLE IF NOT EXISTS `shop`.`product_category` (
`category_id` INT(11) NOT NULL ,
`product_id` INT(11) NOT NULL ,
INDEX `fk_product_category_category1_zxc` (`category_id` ASC) ,
CONSTRAINT `fk_product_category_category1_zxc`
FOREIGN KEY (`category_id` )
REFERENCES `shop`.`category` (`category_id` )
ON DELETE NO ACTION
ON UPDATE NO ACTION)
ENGINE = InnoDB
DEFAULT CHARACTER SET = utf8
COLLATE = utf8_unicode_ci;
Error Code: 1005. Can't create table 'shop.product_category' (errno: 150)
You need an index on category_id in the category table (I see it's part of the primary key, but since it's the second column in the index, it can not be used). The field you are referencing in a foreign key always should be indexed.
In my case the issue was more like what was described in the first article you've linked to.
So I just had to make sure that:
Referenced Column is an index,
both Referencing Column and Referenced Column share the same type and length, i.e. e.g. both are INT(10),
both share the same not null, unsigned, zerofill etc. configuration.
both tables are InnoDB!
Here's the query template where Referencing Column is referencing_id and Referenced Column is referenced_id:
ALTER TABLE `db`.`referencing`
ADD CONSTRAINT `my_fk_idx`
FOREIGN KEY (`referencing_id`)
REFERENCES `db`.`referenced`(`referenced_id`)
ON DELETE NO ACTION
ON UPDATE NO ACTION;
Update 2016-03-13: Ran into this problem again, ended up finding my own answer. This time it didn't help though. Turns out the other table was still set to MyISAM, as soon as I changed it to InnoDB everything worked.