How to Generate a Migration File - Revision history

Admin at 16:17, 19 October 2023

2023-10-19T16:17:29Z

← Older revision		Revision as of 16:17, 19 October 2023
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	A migration file lets you configure database tables.		A migration file lets you configure database tables.


	==Generate a migration file==		==Generate a migration file==

Admin at 16:14, 19 October 2023

2023-10-19T16:14:31Z

← Older revision		Revision as of 16:14, 19 October 2023
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	==Generate a migration file==		==Generate a migration file==

	A migration file is generated using a console command. After it is generated, you write code that configures table fields ~~and then invoke the migration file~~.		A migration file is generated using a console command. After it is generated, you write code to it that configures database table fields.

	The command to create a migration file is:		The command to create a migration file is:

Admin at 16:12, 19 October 2023

2023-10-19T16:12:56Z

← Older revision		Revision as of 16:12, 19 October 2023
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	To initiate the migration ~~yoou~~ run this command:		To initiate the migration, run this command:

			<source>
	mix ecto.migrate		mix ecto.migrate
			</source>

Admin at 16:12, 19 October 2023

2023-10-19T16:12:05Z

← Older revision		Revision as of 16:12, 19 October 2023
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	A migration file lets you ~~update and create table data~~.		A migration file lets you configure database tables.

Admin: Created page with "A migration file lets you update and create table data. ==Generate a migration file== A migration file is generated using a console command. After it is generated, you write code that configures table fields and then invoke the migration file. The command to create a migration file is: mix ecto.gen.migration name_of_migration For this example, I will add a new field named owner mix ecto.gen.migration create_owner_field The mi..."

2023-10-19T16:11:29Z

Created page with "A migration file lets you update and create table data. ==Generate a migration file== A migration file is generated using a console command. After it is generated, you write code that configures table fields and then invoke the migration file. The command to create a migration file is: <source> mix ecto.gen.migration name_of_migration </source> For this example, I will add a new field named owner <source> mix ecto.gen.migration create_owner_field </source> The mi..."

New page

A migration file lets you update and create table data.

==Generate a migration file==

A migration file is generated using a console command. After it is generated, you write code that configures table fields and then invoke the migration file.

The command to create a migration file is:
<source>
mix ecto.gen.migration name_of_migration
</source>

For this example, I will add a new field named owner

<source>
mix ecto.gen.migration create_owner_field
</source>

The migration file after it is created appears in '''app/priv/repo/migrations'''

You now need to type code that performs table specific database actions.

In this example below, a field is added to a preexisting table named :testbeds.

<source>

def change do
alter table(:testbeds) do # customize to your code
add :owner, :string
end
end
</source>

To initiate the migration yoou run this command:

mix ecto.migrate