One-To-Many relation issue

Hi there, First of all, this is an awesome library 😃

The problem that I am facing now is that I am not getting the one-to-many relation data correctly and I know that I must be doing something wrong here, can some point out what I am doing wrong here. I have a Content table which have a many-to-many relation with ContentMusic via a link table music_in_content, also Content has a one-to-many relation with ContentImage table but I am not able to fetch the data for this ContentImage relation.

Below is my schema diagram:

Below is my code:

export class ContentMusic extends Model {
    public readonly id: number;
    public musicType: "express"|"spectral"|"space";
    public musicFileUrl: string;

    public contents: Content[];

    public static tableName = "content_music";
    public static relationMappings: RelationMappings = {
        contents: {
            relation: Model.ManyToManyRelation,
            modelClass: join(__dirname, "Content"),
            join: {
                from: "content_music.id",
                through: {
                    from: "music_in_content.content_music_id",
                    to: "music_in_content.content_id",
                },
                to: "content.id",
            },
        },
    }
}

export class ContentImage extends Model {
    public readonly id: number;
    public contentId: number;
    public contentRefId: number;
    public image: string;

    public content?: Content;

    public static tableName = "content_images";
    public static relationMappings: RelationMappings = {
        content: {
            relation: Model.BelongsToOneRelation,
            modelClass: join(__dirname, "Content"),
            join: {
                from: "content_images.content_id",
                to: "content.id",
            },
        },
    }
}

export class Content extends Model {
    public readonly id: number;
    public category: "fiveSteps"|"music"|"empowerment"|"advance";
    public refId: number;
    public title: string;
    public content: string;
    public infoMessage: string;

    public music?: ContentMusic[];
    public images?: ContentImage[];

    public static tableName = "content";
    public static modelPaths = [__dirname]
    public static relationMappings: RelationMappings = {
        music: {
            relation: Model.ManyToManyRelation,
            modelClass: "ContentMusic",
            join: {
                from: "content.id",
                through: {
                    from: "music_in_content.content_id",
                    to: "music_in_content.content_music_id",
                },
                to: "content_music.id",
            },
        },
        images: {
            relation: Model.HasManyRelation,
            modelClass: "ContentImage",
            join: {
                from: "content.id",
                to: "content_images.content_id",
            },
        },
    }
}

The query is as follows:

const content = await Content.query()
     .eager("[images, music]")
     .where("category", "=", category).debug();
return content;

The result is coming out as follows:

I have scanned the documentation and couldn’t figure out the problem. The music relation is loading fine as it a many-to-many relationship.

I am using the latest version of the library and peer dependency

Any help would be highly appreciated. Thanks in advance 😃

[koskimas]

You are using knexSnakeCaseMappers and therefore need to define everything in camelCase instead of snake_case as explained in the docs. So for example instead of the current mappings, you need to write:

    public static relationMappings: RelationMappings = {
        music: {
            relation: Model.ManyToManyRelation,
            modelClass: "ContentMusic",
            join: {
                from: "content.id",
                through: {
                    from: "musicInContent.contentId",
                    to: "musicInContent.contentMusicId",
                },
                to: "contentMusic.id",
            },
        },
        images: {
            relation: Model.HasManyRelation,
            modelClass: "ContentImage",
            join: {
                from: "content.id",
                to: "contentImages.contentId",
            },
        },
    }

[neriosoft]

How I do I implement one-to-one, one-to-many and many-to-many differently in objectionjs please