TypeORM array is not supported in postgres?

Question

I have a column kid_ages which is Integer[]. When migrating, I get the following error:

DataTypeNotSupportedError: Data type "Array" in "home.kid_ages" is not supported by "postgres" database.

I tried adding the following options to my column:

type: 'array'

and:

array: true,
default: [],
nullable: false,`

@Column({
  array: true,
  default: [],
  nullable: false,
})
kid_ages: string;`

Answer 1

The docs says, that it should work:

@Column("int", { array: true })
array: number[];

this is from the example https://github.com/typeorm/typeorm/blob/master/test/functional/database-schema/column-types/postgres/entity/Post.ts

In your code the array property is no array. Have you tried kid_ages: string[];?

Answer 2

As mentioned above, you can create Postgres' array column with next code:

@Column("int", { array: true })
kid_ages: number[];

If you then need to find some kid with age 5, use this:

kid = getRepository('kid')
        .createQueryBuilder()
        .where(':kid_age = ANY (kid.kid_ages)', { kid_age: 5 });

Answer 3

For people looking to deal with arrays or string within your entities, based on @thopaw 's answer, you can use the following code:

@Column("text", { array: true })
kid_ages: string[];

Answer 4

The important thing to note here that even declaring integer array, the default should be defined as an empty object.

@Column("int", { array: true, default: {} })
ages: Number[];

Answer 5

I tried all of the solutions already mentioned, but none of them worked. Finally found solution among the Github issues in TypeORM repo.

I quote the solution:

This was a simple fix, the type of the column shouldn't be an array. Changed to this and it now works:

@Column({array: true})
tags: string;

Better documentation on arrays would have been useful.

Source

Answer 6

My solution for Postgres for checking array inclusion is as follows:

I have defined the column as follows:

    @Column("text", { array: true, default: "{}" })
    tags: string[];

this.getFindQueryBuilder().where("recipe.tags && ARRAY[:...tags]", {tags: tags})

"getFindQueryBuilder": Is a function to get shared SelectQueryBuilder in order to save code.

The important part here is the where clause that I have shown in the example.