Manual Many to Many relations due to 3 way pivot plus other data.

edster - 1 week ago

So I was doing some reading up on other places, and the below implementation is best suggestion and should be working, but i can't figure out why for the life of me it doesn't work. I actually have 4 streams, but am only working with 3 of them at the moment and can't get it working for them, so lets focus on that.

I basically have to manually deal with the many to many relation manually. I have done this with 3 streams, building, buildings_sections and sections.

Saving buildings works fine, saving sections works fine, its relating them together that is crapping out.

Building model has

/**
     * Get the sections for the building if there are any
     *
     * @return \Illuminate\Database\Eloquent\Relations\HasMany
     */
    public function sections()
    {
        return $this->hasMany('Emange\StrataModule\Strata\BuildingSectionsModel', 'building_id');
    }

Sections model has

/**
     * Get the sections for the building if there are any
     *
     * @return \Illuminate\Database\Eloquent\Relations\HasMany
     */
    public function buildings()
    {
        return $this->hasMany('Emange\StrataModule\Strata\BuildingSectionsModel', 'section_id');
    }

buildings_sections model looks like this

 public function building()
    {
        return $this->belongsTo('Emange\StrataModule\Strata\Building\BuildingModel');
    }

    public function section()
    {
        return $this->belongsTo('Emange\StrataModule\Strata\Section\SectionModel');
    }

Now, I have a sync that I'm trying to do,

if($model->save()){
                //Set the section or sections for this model and save
                if (count(get_object_vars($building->Sections)) > 1) {
                    $sections = [];
                    foreach ($building->Sections as $section){
                        $sections[] = str_slug($section, '-');
                    }
                    $model->sections()->saveMany($sectionRepository->findAllBySlugs($sections)->all());
                } else{
                    $model->sections()->save($defaultSection);
                }
            }

The save many and save is whats crapping out. It is trying to update the sections model, not save to the buildings_sections model, and I can't figure out why. below is the error.

"SQLSTATE[42S22]: Column not found: 1054 Unknown column 'building_id' in 'field list' (SQL: update `martello_group_strata_sections` set `sort_order` = 6, `updated_at` = 2017-11-14 19:37:14, `updated_by_id` = 1, `building_id` = 37 where `id` = 6) ◀"

Help?

edster - 1 week ago

So by using the intermediate model I can insert the records, but I was hoping to be able to use saveMany.

foreach($sectionRepository->findIdsBySlugs($sections) as $entry){
                        $relation = new BuildingSectionsModel;
                        $relation->building_id = $model->id;
                        $relation->section_id = $entry;
                        $relation->save();
                    }

Still hoping someone can point out to me why it hates me

fryiee - 1 week ago

What's the schema of each table look like?

edster - 1 week ago

@fryiee

Sections: name,slug

Buildings:name,addresses,plan,activated

buildings_sections: building_id, section_id, documents,form_price