Spring Data JPA - 按集合中字段的名称查找

Question

两天的思考和搜索以及任何结果 - 互联网和文档都不能回答我的问题。

我需要构造一个 Jpa 存储库方法名称以从数据库中按,字段获取。我还使用连接表和实体来存储配方中每种成分的数量Set<Recipe>IngredientingrNameRecipeIngredientRecipeIngredient

请帮助。

谢谢！

我尝试做这样的事情：

package com.pck.repository;

import com.pck.Recipe;
import org.springframework.data.jpa.repository.JpaRepository;
import org.springframework.stereotype.Repository;

import java.util.Set;

@Repository
public interface RecipeRepository extends JpaRepository<Recipe, Integer> {

    public Set<Recipe> findAllByRecipeIngrs_Ingredient_IngrNameIn(Collection<String> ingredientNames)

}

但这不起作用。

食谱：

package com.pck.entity;

import javax.persistence.*;
import java.util.*;

@Entity
@Table(name="recipes")
public class Recipe {

    @OneToMany(cascade = CascadeType.ALL, fetch = FetchType.LAZY, orphanRemoval = true, mappedBy = "recipe")
    private Set<RecipeIngredient> recipeIngrs;

    public Recipe() {}

    public Set<RecipeIngredient> getRecipeIngrs() {
        return ingredients;
    }
    public void setRecipeIngrs(Set<RecipeIngredient> recipeIngrs) {
        this.recipeIngrs = recipeIngrs;
    }

    // ... other fields, constructors, getters, setters
}

配方成分：

package com.pck.entity;

import javax.persistence.*;
import java.util.Objects;

@Entity
@Table(name="recipe_ingredient")
public class RecipeIngredient {

    @JsonIgnore
    @ManyToOne(cascade = {CascadeType.DETACH, CascadeType.MERGE, CascadeType.REFRESH})
    @JoinColumn(name = "recipe_id")
    private Recipe recipe;

    @ManyToOne(cascade = {CascadeType.DETACH, CascadeType.MERGE, CascadeType.REFRESH})
    @JoinColumn(name = "ingredient_id")
    private Ingredient ingredient;

    @Column(name = "ingredient_amount_grams")
    private double ingredientAmountGrams;

    public RecipeIngredient() {}

    public Recipe getRecipe() {
        return recipe;
    }
    public void setRecipe(Recipe recipe) {
        this.recipe = recipe;
    }

    public Ingredient getIngredient() {
        return ingredient;
    }
    public void setIngredient(Ingredient ingredient) {
        this.ingredient = ingredient;
    }

    public double getIngredientAmountGrams() {
        return ingredientAmountGrams;
    }
    public void setIngredientAmountGrams(double ingredientAmountGrams) {
        this.ingredientAmountGrams = ingredientAmountGrams;
    }

    // ... other fields, constructors, getters, setters

}

成分：

package com.pck.entity;

import javax.persistence.*;
import java.util.*;

@Entity
@Table(name="ingredient")
public class Ingredient{

    @Column(name="ingr_name")
    private String ingrName;

    @OneToMany(cascade = CascadeType.ALL, fetch = FetchType.LAZY, orphanRemoval = true, mappedBy = "ingredient")
    private Set<RecipeIngredient> recipeIngrs;

    public Ingredient() {}

    public String getIngrName() {
        return ingrName;
    }
    public void setIngrName(String ingrName) {
        this.ingrName = ingrName;
    }

    public Set<RecipeIngredient> getRecipeIngrs() {
        return recipeIngrs;
    }
    public void setRecipeIngrs(Set<RecipeIngredient> recipeIngrs) {
        this.recipeIngrs = recipeIngrs;
    }
}

Answer 1

您可以利用 jpql：

@Query("select r from Recipe r inner join r.recipeIngrs ri inner join ri.ingredient i where i.ingrName in :names")
public Set<Recipe> findAllByIngrNameIn(@Param("names") Collection<String> ingredientNames)