unable to get table from postgreSQL despite the spring boot program being connected to database and the database not being empty - postgresql

Question

I am rather new to Spring boot and I am trying to write a very simple program that can perform post, get and delete on a postgreSQL data base. the database is named "recipes" schema "public" and table "recipe"
The problem that I ran into is that when I make the get request through postman, it simply returns null despite the data base being initialized with data.
like so
I did my best to try and narrow down the problem and the furthest I got is that line from the service layer is returning nothing when evaluated
jdbcTemplate.query(sql, new RecipeRowMapper())
The database is initialized with the following SQL
INSERT INTO recipe(id, name, ingredients, instructions, date_added)
values (1, 'ini test1', '10 cows 20 rabbits', 'cook ingredients with salt', '2004-01-02'),
(2, 'ini test2', '30 apples 20 pears', 'peel then boil', '2004-01-13');
I know the database is not empty because when I run the following SQL
SELECT * from recipe
i get
And the data base is connected as seen below (one thing I do find strange is that the table "recipe" isn't showing up in the DB browser but I don't know what to make of it)
application.yml
app:
datasource:
main:
driver-class-name: org.postgresql.Driver
jdbc-url: jdbc:postgresql://localhost:5432/recipes?currentSchema=public
username: postgres
password: password
server:
error:
include-binding-errors: always
include-message: always
spring.jpa:
database: POSTGRESQL
hibernate.ddl-auto: create
show-sql: true
dialect: org.hibernate.dialect.PostgreSQL9Dialect
format_sql: true
spring.flyway:
baseline-on-migrate: true
this is the service layer
public List<Recipe> getRecipes(){
var sql = """
SELECT id, name, ingredients, instructions, date_added
FROM public.recipe
LIMIT 50
""";
return jdbcTemplate.query(sql, new RecipeRowMapper());
}
and this is the controller
#GetMapping(path = "/test")
public String testRecipe(){
return recipeService.test();
}
and rowmapper
public class RecipeRowMapper implements RowMapper<Recipe> {
#Override
public Recipe mapRow(ResultSet rs, int rowNum) throws SQLException {
return new Recipe(
rs.getLong("id"),
rs.getString("name"),
rs.getString("ingredients"),
rs.getString("instructions"),
LocalDate.parse(rs.getString("date_added"))
);
}
}
finally recipe entity looks like this
#Data
#Entity
#Table
public class Recipe {
#Id
#GeneratedValue(
strategy = GenerationType.IDENTITY
)
#Column(name = "id", updatable = false, nullable = false)
private long id;
#Column(name = "name")
private String name;
#Column(name = "ingredients")
private String ingredients;
#Column(name = "instructions")
private String instructions;
#Column(name = "date_added")
private LocalDate dateAdded;
public Recipe(){};
public Recipe(long id, String name, String ingredients, String instructions, LocalDate date){}
public Recipe(String name,
String ingredients,
String instructions,
LocalDate dateAdded
) {
this.name = name;
this.ingredients = ingredients;
this.instructions = instructions;
this.dateAdded = dateAdded;
}
}

Answer 1

As it turns out the problem is caused by the LocalDate not being converted correctly and was being posted as null. That caused the
LocalDate.parse(rs.getString("date_added"))
to throw a null pointer exception which is what has been causing all the problems...